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20 Best LB7 Duramax Upgrades: Review Guide 2022

The LB7 Duramax diesel is a direct-injected, turbocharged, intercooler, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque.

The 6.6L Duramax, starting from a blank sheet of paper is recognized as one of the fastest diesel development programs across the globe to date.

One can easily plan and execute the LB7 Duramax upgrades. Chevy and GMC trucks pull power from the LB7 Duramax engine.

In partnership with Japanese Isuzu, General Motors led the production of the DuramaxLB7 engine for pickup trucks in the year 2001. Furthermore, the LB7 engine used by trucks resulted in high power and better fuel mileage.

During that era, diesel models were very noisy compared to the standard rail injection system of LB7 Duramax.

Moreover, its standard rail injection system was quieter than that of the diesel models of that era. In the case of a new vehicle, LB7 Duramax has always proved trustworthy.

Additionally, the engine also encounters problems as time passes by and the vehicle ages, and here is where the performance of LB7 upgrades comes into play.

This blog will showcase 20 of the best upgrades for the LB7 Duramax trucks. Also, an all-inclusive buying guide with a FAQ section will help you make a fruitful and worthy choice by simplifying your decision.


Which is the best LB7 Duramax upgrade?

Airdog A6SPBC259 is one of the best upgrades out of 20 listed below. If the pump of your vehicle malfunctions, then the Airdog version would offer you the requisite help to get the problem resolved.

Why is Airdog A6SPBC259 considered the best?

Airdog A6SPBC259is the best fuel lift pump. Not it enhance the torque and auto power, but it also improves throttle response.

Above all, the pump is very quiet and one cannot hear it running. Also,  the fuel mileage increases to a certain extent.

Comparison Table of The Best LB7 Duramax Performance Upgrades

01. Airdog A6SPBC259
02. ARP 2304201
03. Pacific 116030000
06. MMTS-CHV-01DL Mishimoto
07. Upower 4” Inlet
08. ACDelco 18M2426
09. PPE 117000500
10. Hitachi Parts Player
11. Mishimoto MMTC-DMAX-03SL
12. RDP
13. Southwest Speed
14. GXP
15. Sinister Diesel SINSDWWP06
16. PPE 114000550
17. Badger Diesel
19. Sinister Diesel SD-CAI-LB7
20. Edge Products 28500


Top 20 LB7 Duramax Performance Upgrades Reviews

01. A6SPBC259 Fuel Lift Pump by Airdog: Best Automated Fuel Transmission



Product Features

  • Made using metal
  • Reflex fuel transmission
  • Fuel line of ½ inch
  • Includes mounting brackets and hardware
  • Simple set up system
  • Greater torque and engine power

Product Specifications

  • Brand: Airdog
  • Model: A6SPBC259
  • Weight: 1 pound
  • Dimensions: 50.8 x 20.3 x 33 centimeters

Product Description and Performance

Airdog’s A6SPBC259 fuel lift pump is known for its exceptional automatic capabilities for fuel transmission.

To facilitate it, the pump utilizes the engine’s power to transmit the fuel directly from the tank towards the diesel engine compartment.

Eventually, it aids in improving the performance and efficiency of the engine to a noticeable extent. Likewise, it is a low-pressure lifting pump that aids in increasing the life cycle of the injectors too.

“Coming onto the set-up system, it is quite straightforward and quick. In addition, the user will also be getting an installation guide. Owing to it, one can use this product without any professional assistance. Moreover, the inclusion of mounting brackets and hardware eases the job of the user while installing the pump.”

With the fuel fitting function, this product delivers smooth and hassle-less operation. Further, this lift pump fills the injection pump with sufficient fuel and aids in getting rid of the impurities present in the oil.

As a result, the user gets to experience superior throttle response with reliable functioning of the engine. Such striking features make this one of the excellent choices for LB7 Duramax.


  • High-precision fitting
  • Lightweight build-up
  • Smooth and long-lasting application
  • Protection against dirt and pollutants


  • Unfortunately, the lengths of the fittings and hose have minor differences


Place the double-decker mounting plate over the internal frame rail. Thus it will lessen the dirt and dust exposure of the product.

Airdog’s A6SPBC259 fuel lift pump is quintessential for those who are using models without factory pumps. Above all, this product effectively looks after the engine to enhance its overall functioning.

02. 2304201 Head Stud by ARP: Best Versatile Applicability



Product Features

  • Tensile strength of 220,000
  • Finishing with black oxide
  • Cylinder head with 12 points
  • Torque readings with accuracy
  • Proportionate circulation of load
  • Pre-fabricated design

Product Specifications

  • Brand: ARP
  • Model: 230-4201
  • Weight: 11.87 pounds
  • Dimensions: 11 x 7.6 x 2.3 inches

Product Description and Performance

ARP’s 230-4201 head stud is crafted with premium-quality materials to deliver unmatchable performance in the segment.

All the head studs go through various processes such as cold-shaping and heat-treatment before rolling and machinery work.

Ultimately, it adds to the durability of the product, making it suitable for long-term use.

“Not to mention, the studs have wide-ranging applications that make them worth every penny of yours. Precisely, they are designed to suit a variety of engines. Moreover, the studs are pre-fabricated, so the user does not have to drill the holes for installing them.”

An appealing aspect of this product is that it flaunts black oxide finishing that significantly enriches its aesthetics. Further, the 12-points stud kit comprises parallel washers that are solidified as well.

These play an essential role in providing accurate torque readings to the user. Besides, it also ensures proportionate dispersal of the load for consistent functioning of the engine.

Above all, the studs are resistant to the inevitable deteriorations and require lesser maintenance too.


  • Versatile component with multiple uses
  • Robust yet reusable
  • Proportionate circulation of load
  • Ideal for long-term usage


  • Not suitable for the users who are having budget-constraints


ARP’s 2304201 head studs are reusable and strong enough to resist damages. Most importantly, the studs comprise an exceptional tensile strength of 220,000.

Yet, the cherry on the top is the pre-fabricated assembling of the studs that eliminates the requirement to drill the holes. Hence, you can do the installation on your own in lesser time.

03. 116030000 Boost Increase Valve by Pacific Performance Engineering (PPE): Best Budget-friendly



Product Features

  • Build using aluminum
  • Blue anodized finishing
  • Increases stock up to 23 to 25psi
  • Reduction in EGTs
  • Single piece component
  • Lifts the stock pressure

Product Specifications

  • Brand: Pacific Performance Engineering (PPE)
  • Model: 116030000
  • Weight: 0.81 ounces
  • Dimensions: 3.25 x 3 x 0.25 inches

Product Description and Performance

Pacific Performance Engineering’s 116030000 boost increase valve offers a combination of both features along with affordability.

Further, this component is made using high-quality aluminum that enhances its sturdiness and reliability. In particular, the product is efficient in increasing the pressure of the turbo.

Likewise, this valve is explicitly engineered to improve the functioning of the fuel system of the truck.

“A striking aspect of the valve is that the capability to surge the stock from 18-20psi towards 23-25psi. Talking about the compatibility, this product goes perfectly well with the diesel engine of the LB7 Duramax.”

However, this valve incorporates premium-quality construction materials with innovative technology to deliver impressive output.

Another notable feature of this product is that it improves the performance and efficiency of the engine and reduces the EGTs.


  • Hassle-less installation process
  • Crafted with top-notch advanced materials
  • Steadfast application in prolonged use
  • Lightweight yet robust build-up


  • At times, the boost coming from the valve is not much extensive


Pacifica Performance Engineering’s valve flaunts a blue anodized body of aluminum to offer unmatchable durability.

Ultimately, it infuses consistency in the performance for quality output. Yet make sure to follow the installation instructions thoroughly for a perfect fitting.

04. FPE-INTAKEHORN Intake Horn High Flow by Fleece Performance Engineering: Best Air Replacement Efficiency



Product Features

  • Engineered with robust materials
  • Intake horn with higher flow
  • Arrives with a gasket
  • Compatible with a stock airbox
  • Enhances the turbo sound
  • Offers perfect fitting

Product Specifications

  • Brand: Fleece Performance Engineering
  • Weight: 1.85 pounds
  • Dimensions: 10 x 10 x 10 inches

Product Description and Performance

Fleece Performance Engineering’s FPE-INTAKEHORN comes in handy when the air intake system of the vehicle gets faulty.

Owing to it, this product can be one of the most effective upgrades available in the market. A pivotal role of this product is to let the air easily reach the engine.

Thus, the user gets to experience consistent and flawless performance even in extreme conditions.

“Generally, having a good intake system aids the engine in carrying out the combustion process with ease. Similarly, this air intake horn works reliably to ensure continual airflow into the engine. Hence it improves the fuel consumption to deliver power-packed output.”

Talking about the compatibility, this product works well with the stock airbox too. Therefore, it enables the turbo to breathe correctly instead of adding a boost to the system.

Besides, it also enriches the turbo sound without causing any disruptions. Another remarkable feature about this air intake horn is the simple installation process that adds to the user’s convenience.


  • Quick set-up system
  • Long-lasting and resilient
  • Hassle-less fitting with gasket
  • Allows better airflow to the engine


  • Lacks the inclusion of other basic hardware


Undoubtedly, this intake horn by Fleece Performance Engineering will take the engine’s functioning to the next level.

However, if you already have a pre-existing intake horn, use long tweezers instead of a wrench to remove it. Afterward, one can quickly begin with installing this brand-new intake horn.

05. FPE-TL-LB7-LLY Transmission Cooler Line by Fleece Performance Engineering: Best for Permeable Transmission Lines



Product Features

  • PTO covers of billet aluminum
  • Treats the leaking transmission lines
  • Heavy-duty build-up
  • Includes installation manual
  • Dual hose clamp and OD washers
  • Kit contains all the necessary components

Product Specifications

  • Brand: Fleece Performance Engineering
  • Model: FPE-TL-LB7-LLY
  • Weight: 5 pounds
  • Dimensions: 14 x 14 x 5 inches

Product Description and Performance

Fleece Performance Engineering’s transmission cooler line helps fix the transmission lines that have leakage. In this comprehensive product, one will get a dual hose clamp along with latching cable ties.

There are two big OD washers, two NPT to 10AN fittings of 1//2 inch, and two transmission lines. Besides, the kit also contains two O-ring to 10AN fittings of ¾ inch-sixteen and six O-ring to 10AN fittings of 7/8 inch-fourteen.

“Furthermore, the transmission lines comprise heavy-duty engineering. Due to it, the product is suitable for hard-wearing applications. Apart from it, the transmission lines are of high flow and flexible too. One can even utilize this kit for the radiator.”

There are PTO covers of billet aluminum along with this product. In particular, these are having gaskets and head bolts that aid in finishing the transmission neatly.

Moreover, the installation process is pretty much straightforward and less complicated. Above all, this product is an excellent replacement for the aluminum lines.


  • Long-lasting and steadfast application
  • Ensures accurate fitting
  • Suitable for use with radiator
  • Head bolts with gasket for clean transmission


  • Nevertheless, the quality of the supplementary components is not up to the mark


Start the installation process based on your vehicle’s radiator type. Make sure to follow the installation instructional properly and use the given components wisely.

If you are a newbie, it is advisable to seek professional assistance to avoid any problems.

06. MMTS-CHV-01DL Low-Temperature Racing Thermostat by Mishimoto: Best for Hot Climates



Product Features

  • Lower temperature activation
  • Bundled with one each 174F and 180F thermostat
  • Rubber gaskets are also included in the package
  • OEM replacements enabling direct-fit easy installation

Product Specifications

  • Brand: Mishimoto
  • Model: MMTS-CHV-01DL
  • Weight: 8.3 ounces
  • Dimensions: 3 x 6 x 4 inches

Product Description and Performance

Mishimoto was established in the year 2005 and has excelled in providing excellent cooling upgrades. It is in this series where Minishota’s MMTS-CHV-01DL do an excellent job.

“Mishimoto thermostats enhance the cooling efficiency by decreasing engine high temperatures generated due to updated turbo applications. This is compatible with a wide range of LB7 models with cost-effectiveness.”

Above all, the Mishimotothermostat gets activated at a lower level of temperature in comparison to the OEM ones.

If you are one of those who overload the vehicle and drive on rough roads quite often, this thermostat is for you.

Moreover, the ease of installation due to its direct-fit option helps you save time and additional expenses for professionals.

Also, the perfect fit will help you keep your vehicle cool even in the summers.


  • Easy installation process
  • Economical in comparison to OEM thermostats
  • Coolant activation at a lower temperature
  • Suitable for hot climates, rough roads, and overloaded vehicles


  • Keep sticking closed


If you live in a hot region and drive mostly on rough terrains, this thermostat will help cool down your vehicle’s engine.

The lower activation temperature facilitates coolant to blow through the engine swiftly to maintain a low temperature.

07. 4” Inlet Diesel Welded On Resonator Exhaust Muffler by Upower: Best Noise-Free Exhaust Performance



Product Features

  • Superior welded design for robustness and durability
  • Stainless Steel-Fiberglass material built-up for high-quality protection
  • Use of CRF technology to negate interior resonance
  • 4 inches each inner diameter outlet and inlet
  • Excellent flow and straight flow path

Product Specifications

  • Brand: Upower
  • Model: XS2772
  • Weight: 12.67 pounds
  • Dimensions: 30.7 x 7.5 x 7.5 inches

Product Description and Performance

Muffler has its manufacturing factory and is excellent in professional product design and after-sales support.

If you are looking for an LB7 performance upgrade, look no further; try this model of Muffler as it has a perfect fit size.

“The muffler XS2772 has a straight flow path for superior airflow and throaty sound. The welded design makes it a durable product. To avoid any hindrance in exhaust flow and help cut back pressure, this product has a straight-through design.”

Above all, the Continuous Roving Fiberglass (CRF) technology helps get rid of unsolicited interior resonance.

Also, the material used to build the product is stainless steel which makes it last longer. 100% welded design ensures sturdiness and durability.


  • Perfect size fit for MBRP
  • Easy to install as it is plug and play
  • Increased durability due to good build quality
  • Both inlet and outlet diameter is the same
  • Cost-effective
  • Sounds good


  • Not reduces exhaust noise completely


Besides this, it enhances excellent directional flow, which helps exhaust fumes flow hassle-free. Hence, reducing the pressure.

08. Professional 18M2426 Brake Master Cylinder Assembly by ACDelco: Best Durability and Resiliency



Product Features

  • Pressure tested for safety and better braking experience
  • Meets brake performance requirements such as SAE J1153 AND J1154
  • Superior resistance to heat, corrosion, and leakage
  • Use of cast iron and aluminum materials
  • Geometrical tolerance to ensure proper fit

Product Specifications

  • Brand: ACDelco
  • Model: 18M2426
  • Weight: 1.33 pounds
  • Dimensions: ‎11.3 x 7.7 x 5.6 inches

Product Description and Performance

Sturdiness is what makes this brake master cylinder stand out from others in the market. Besides, the construction materials used to build this product consist of iron castings and aluminum, it is durable and lasts longer.

Piston assembly of this brake master cylinders are such that they prevent brake drag. Prevention in brake drag helps avoid quick wear and tear of brake pads.”

To match the perfect fit of the body and plastic reservoir, it has geometrical tolerance. Above all, it is pressure tested for safety and a robust braking system.


  • Perfect fitting and functioning
  • Swift installation without any hassle
  • Long-lasting factory parts
  • Durable due to the materials used, such as iron casting and aluminum
  • Value for money


  • Quality issues


ACDelco Professional aftermarket replacement Brake Master Cylinders are manufactured to meet user expectations of fit, form, and function. These are ready to install immediately, just out of the box.

09. 117000500 Performance Parts and Miscellaneous Accessory by PPE: Best in Reducing Exhaust Gas Temperature



Product Features

  • Flexible and easy to use
  • Compatible and perfect fit for specific vehicles
  • Consists of heavy-duty pipe
  • 3 inches diameter
  • Thick and sturdy drive clamps

Product Specifications

  • Brand: PPE
  • Model: ‎117000500
  • Weight: 1 Pound
  • Dimensions: 21 x 10 x 8 inches

Product Description and Performance

If you are looking for a sturdy exhaust upgrade, PPE 117000500 is the best choice. PPE 117000500 comes with a heavy-duty pipe which makes it durable and long-lasting.

“Besides this, this product is easy to install without the help of an expert professional as you only need to bolt it up. Apart from that, it fits perfectly depending on the area where you want to apply it.”

Furthermore, PPE 117000500 connects swiftly to the exhaust outlet of the turbo along with the exhaust pipe. Hence, this occupies significantly less space on the factory downpipe.

Though the turbo is a little noisy, you can ignore it because of its strength and excellent throttle response.


  • Robust and heavy duty
  • Easy to install with a swift bolt it up on pipes
  • Quality construction
  • Perfect fit for the right engine
  • Downpipe is sturdy


  • Thick flange leading to fitting issues at the back of the turbo


Remember to choose the right engine; otherwise, you will end up with a leaky exhaust.

10. Hitachi New Starter Replacement by Parts Player: Best Reliable Engine Starter



Product Features

  • Premium-quality components
  • Meets OEM specifications
  • Tested for performance, reliability, and durability
  • Good quality starter
  • Bundled with fitment chart

Product Specifications

  • Brand: Parts Player
  • Model: Hitachi OSGR
  • Weight: 14.85 pounds
  • Dimensions: 13.19 x 8.27 x 8.07 inches

Product Description and Performance

Hitachi’s new starter replacement by Parts Player is a perfect replacement for Chevrolet and GMC models V8 6.6l engine.

Undoubtedly this is one of the reliable replacement parts for Chevy LB7, GM, and LBZ autos.

Swift installation process of this product helps it fit and bolt in easily. Hence, this saves your additional expenses on the professional’s help to fit the product.

Hitachi is very confident that this product meets the OEM benchmarks to their optimum. Above all, this helps you start your engine swiftly by saving time. Also, it has an OSGR design with 2.2 KW/12 Volt and nine teeth.


  • Swift bolt-in installation process
  • Swift engine start
  • Sturdy and robust build quality
  • OEM quality
  • A tremendous cost-effective replacement unit


  • Durability issues


If you are one of those who owns Silverados or Sierras, you should not miss this product. Hitachi claims that this product exceeds the OEM benchmarks to an unbelievable exception. So, give it a try.

11. MMTC-DMAX-03SL Transmission Cooler Silver by Mishimoto: Best Cooling for Transmission System



Product Features

  • Direct-fit set up system
  • CNC-machined premium adapters
  • Stacked-plate assembly
  • 174% more core volume
  • 192% greater surface area
  • Includes custom-made hoses

Product Specifications

  • Brand: Mishimoto
  • Model: MMTC-DMAX-03SL
  • Weight: 9.33 pounds
  • Dimensions: 29 x 4 x 14 inches

Product Description and Performance

Mishimoto’s MMTC-DMAX-03SL transmission cooler is ideal for those who are residing in hot regions. Besides, it has machined exteriors along with a silver-colored finishing for an appealing look.

On top of that, the stacked-plate engineering provides optimal durability along with excellent cooling properties. Most importantly, the user will get the direct-fit brackets and custom-made hoses to ease the installation process.

“Further, the CNC-machined top-quality adaptors make it easier to link the cooler towards the AN lines or stock fluid lines. Ultimately, it cools down the system and keeps a check on the leakage. Therefore, it reduces the adverse effects of the extremely hot temperatures.”

Apart from it, the cooler offers 174% more superior core volume than the stock cooler. Likewise, it has a 192% bigger surface area for the external fin.

If you want to alter the vehicle’s transmission line for excellent performance, this transmission cooler will suffice the requirements. Last but not least, all the parts arrive in a high-end and convenient protective case.


  • Facilitates leakage-free cooling
  • Effortless installation procedure
  • Durable transmission cooler
  • Consists of a storage box


  • The robustness of the hose clamps is not satisfactory


Mishimoto’s transmission cooler is capable of preventing leakage, thereby providing adequate cooling. Since the heat can deteriorate the transmission system.

In such cases, this product will come handy. One must utilize the direct-fit brackets with hoses to reinforce the fitting.

12. Bolt-On Replacement Passenger Side Up Pipe and Gaskets by RDP: Best Damaged/Defective Pipe Replacement



Product Features

  • Superior-quality bellow
  • Direct bolt-on installation
  • Well-equipped with new gaskets
  • Flexible bends for a great fitting
  • Smooth and sleek finish surface
  • Significant reduction in EGTs

Product Specifications

  • Brand: RDP
  • Model: DP0057-LB7
  • Weight: 3.61 pounds
  • Dimensions: 17.24 x 6.22 x 3.62 inches

Product Description and Performance

RDP’s DP00577-LB7 side-up pipe kit is beneficial for vehicles with faulty pipes. There are a bellow and laser-cut extensions that assist in achieving perfect fitting without much hassle.

Additionally, this high-performing product consists of premium gaskets as well. Besides, this pipe functions flawlessly to accomplish the combustion process with ease.

“Not to mention, this product has a direct bolt-on fixing system that makes the installation a lot easier than ever. Moreover, the pipe aids in lessening the EGTs to deliver impressive and power-packed output. Aside from it, the components are of top-notch quality for ensuring long-lasting application.”

Generally, the combustion chamber produces the exhaust gases, which then pass through the exhaust manifold. Further, the gases travel through the up pipe and reach the turbocharger.

Afterward, the gases exit the turbocharger and move out of the downpipe. In the end, the gases enter and exit through the exhaust pipe and auto, respectively.

However, this product makes the whole process smooth and eliminates obstructions.


  • Improves the combustion process
  • Great replacement for damaged pipes
  • Durable supplementary components
  • Made with robust materials


  • There is no inclusion of bolts with the product


If the exhaust pipe of your vehicle’s system has become defective, look no further than getting RDP’s up pipe. Ensure to use the laser-cut durable flanges and the gaskets while installing the pipe into the system for an accurate fitting.

13. Brand New Superchips Flashpaq F5 In –Cab Tuner by Southwest Speed: Best Tuning Performance



Product Features

  • Controls for fuel management
  • Easy accessibility of trouble codes
  • HD 2.8” color screen
  • Redeveloped graphical interface
  • Fast processor with higher memory
  • Updates through the internet via USB

Product Specifications

  • Brand: Southwest Speed
  • Model: SPC-2845
  • Weight: 11.2 ounces

Product Description and Performance

Southwest Speed’s SPC-2845 programmer is designed specifically for daily commutation, heavy towing, and off-road driving.

Besides, this in-cab tuner comprises multiple power intensities ranging from performance, economy, and towing. In particular, this tool instantly directs the power to the vehicle within a few minutes only, which is quite impressive.

“An appealing aspect of this tuner is that it incorporates the advanced technology for providing diesel coverage. More to say, this tool has the best-in-class applications, power enhancements, and features for an exceptional driving experience.”

Apart from it, this programmer flaunts an HD color screen of 2.8”. In addition, the user will get the reinvented graphical interface for a user-friendly experience.

There is bigger memory and a quicker processor for better tuning and speed updates. Precisely, this tool aids in rectifying the variations in tire size along with gear ratio.

One can customize the speed, tune the shift points and firmness and facilitate the TQ management with this programmer.


  • Monitors the parameters of the vehicle
  • Displays the indicative trouble codes
  • Suitable for diesel and gasoline engines
  • Equipped with Flashpaq F5 latest program


  • At times, it becomes challenging to remote-lock the programmer


Southwest Speed’s comprehensive programmer offers all the features required for seamless tuning performance.

Ensure that you have an active and high-speed internet connection while downloading the updates to prevent glitches or errors.

14. Updated Driver Side Exhaust Manifold and Hardware by GXP: Ideal for Zero Exhaust Manifold Fumes



Product Features

  • OE-style replacement for 2011-16 trucks
  • Powerful upgrade for 2001-10 trucks
  • Reusable fasteners and basic hardware
  • Less-complicated installation procedure
  • Premium-quality construction
  • Resists leaks and other damages

Product Specifications

  • Brand: GXP
  • Model: DP0355
  • Weight: 11.23 pounds
  • Dimensions: 17.64 x 5.67 x 5.35 inches

Product Description and Performance

GXP’s DP0355 exhaust manifold and hardware kit is an OE-quality replacement for the truck models of 2011 to 2016. On the other hand, it is an effective high-flow and power-packed upgrade for the truck models of 2001 to 2010.

Usually, the engine requires some alteration in the exhaust manifold after a certain period. Not to mention, an exhaust manifold is a connected part of the engine’s block.

“An exhaust manifold is the primary component of the exhaust pipe. Further, this product excellently aids in channeling the exhaust gases through the cylinders. Afterward, it directs the gases towards the catalytic converter of the auto with ease.”

Moreover, this exhaust manifold comprises a robust and durable build-up. Because of this, it can withstand inevitable deteriorations to deliver consistent output with each application.

Another considerable aspect of this product is the inclusion of reusable essential hardware. Lastly, you must get this exhaust manifold to improve the overall functioning of the engine during the combustion process.


  • Effortless fixing with accurate fitting
  • Makes the combustion flawless
  • Enriches the functioning of the exhaust
  • Maintains engine’s efficiency


  • Bolts inside the kit are a bit tricky to work with


In extreme cases, if the exhaust manifold is leaking, the gases will tend to escape. Consequently, it can lessen the accuracy level of the oxygen sensor and provide incorrect readings.

However, the same happens when the exhaust fumes also leak. One must look for the check engine light that appears on the system to prevent such glitches.

15. Welded Water Pump by Sinister Diesel: Best-In-Class Welded and Durable Water Pump



Product Features

  • Supports LBZ, LML, and LMM models of 2006-10
  • Hassle-less fitting for the truck
  • Contains a plastic impeller
  • TIG welding on gear part
  • Crafted with premium-quality materials
  • Robust and sleek build-up

Product Specifications

  • Brand: Sinister Diesel
  • Model: SINSDWWP06
  • Weight: 1 pound
  • Dimensions: 9.6 x 9.4 x 4.8 inches

Product Description and Performance

Sinister Diesel’s SINSDWWP06 water pump is practically engineered and consists of solid materials of industry-grade only.

In particular, the high-precision TIG welding over the gear side ensures a slip-proof application. Apart from that, it adds to the strength and durability of the product.

“An important thing to note is that this product is compatible with the LMM, LBZ, and LML models of 2006-16. For the other LB7 models, you can opt for the different variants of this product.

Moving on to the construction, this welded pump contains a plastic impeller instead of a metallic one. Despite that, it delivers long-lasting, reliable, and efficient performance without much maintenance.

Other than this, the installation process of the welded pump is not much difficult. Eventually, all such aspects make it easy for the user to operate the product effortlessly.


  • Superior quality performance
  • Hard-wearing application
  • Lesser maintenance requirements
  • Ideal proportions of size and weight


  • Lacks inclusion of steel in the composition for better resilience


Sinister Diesel’s welded water pump is nothing less than a fruitful investment for the system of your vehicle. Though if you have LB7 Duramax models, make sure to check the compatibility of the product.

In addition, seek professional assistance to set up this product, especially if you are a beginner.

16. 5 Micron Premium High-Efficiency Oil Filter 114000550 by Pacific Performance Engineering: Best for Oil Purification



Product Features

  • Filtration system with five micron
  • No requirement for an adapter
  • Drilled core of metal
  • Spirally-enclosed adhesive
  • Accordion-wrapped nylon
  • Made with fiberglass media

Product Specifications

  • Brand: Pacific Performance Engineering
  • Model: 114000550 Classic Black
  • Weight: 2.73 pounds
  • Dimensions: 10.55 x 4.53 x 4.45 inches

Product Description and Performance

Pacific Performance Engineering’s oil filter efficiently carries out the process of oil cleaning for maximum purification. Likewise, this high-performance oil filter works as a direct replacement for the factory oil filter without any adapter.

Most importantly, the filtration system comprising of five microns aids in the flawless functioning of the system.

“A 13/16-16 baseplate that is UNF threads as well offers 120% bigger and larger passages. There is twice the conventional surface area and a better filtration system with a long-lasting filter life cycle. To put it simply, this product is all that you need to keep the engine oil cleaner.”

Not to mention, this filter boosts the oil capacity by up to one quart. There are 900 square inches of accordion-folded premium nylon material along with fiberglass media.

A noteworthy thing about this product is the perforated core of metal that ensures durable application. Aside from it, the spirally concealed adhesive safeguards the filter media.


  • Wide-ranging engine compatibility
  • Removes the dirt and contaminants
  • Innovative filtration system
  • Hard-wearing construction


  • In extreme conditions, the air filter’s seal might blow out


PPE’s oil filter can sieve and hold the impurities and grime down to over five microns. One will also get an extra surface area in comparison to the typical oil filter.

Install the oil filter inside the engine’ system carefully for thorough oil cleaning.

17. Fuel Injector Installation Kit with Valve Cover Gaskets by Badger Diesel: Best Replacement for Injector



Product Features

  • Two valve cover premium gaskets
  • 10 washers set for sealing return line
  • Durable O-rings for the injector
  • Chamber gaskets of copper
  • Less-complicated setup process
  • Ensures precision fitting

Product Specifications

  • Brand: Badger Diesel
  • Model: 66install
  • Weight: 8.1 ounces
  • Dimensions: 10.63 x 6.81 x 1.73 inches

Product Description and Performance

Badger Diesel’s fuel injector installation kit is an excellent option if you are looking to replace the injector of the vehicle’s system.

In total, the kit comprises two valves or rocker cover strong gaskets along with injector O-rings. Apart from that, the user will get chamber gaskets of copper for the injector.

There is also the inclusion of ten washers’ sets for the return line sealing of the injector.

“Generally, a good quality injector enhances the performance of the vehicle for better drivability. To facilitate this, one must set up this fuel injector kit properly into the vehicle’s system. Ultimately, it will deliver the seamless engine functioning in prolonged use.”

Undeniably, the Duramax engine works excellently. Yet, one crucial component that can go wrong at times is the injector system.

Some of the reasons behind this are excessive heat exposure, moisture, entrained airflow, inefficient filtration, and poor design. Hence, this product is a must to combat such issues.


  • Made using top-quality materials
  • Easy and convenient application
  • Contains all the valuable accessories
  • Improves the functioning of the injector


  • Nevertheless, the gaskets are thin and prone to leaking as well


The fuel injector kit by Badger Diesel comes pre-equipped with all the necessary hardware and small parts for ease of installation.

Make sure to utilize all the additional accessories in the kit properly to apply the product effectively.

18. FPE-TAPSHIFTER35 Tap Shifter by Fleece Performance Engineering: Best Controlling of Shift Points of the Transmission



Product Features

  • Compatible with LB7, LLY GM, and Allison
  • Superior downshift control
  • Confines the up-shifts transmission
  • Maximum control over the vehicle
  • Build using sturdy materials
  • Heavy-duty application

Product Specifications

  • Brand: Fleece Performance Engineering
  • Weight: 1.61 pounds
  • Dimensions: 3 x 6 x 12 inches

Product Description and Performance

Fleece Performance Engineering’s tap shifter is a great choice for properly regulating the shift points of a transmission.

Aside from it, the product features a plug & a play fixing system that makes the application easier and more convenient than ever. Because of this, one can use the product without any difficulties.

“No matter whether the vehicle is old or new, it will require an update. Well, one of the most effective ways to do the same is by getting FPE’s high-performance tap shifter. Top-notch engineering along with striking features are the key aspects of this product.”

Moreover, the tap shifter restricts the up-shifts to deliver consistent and impressive output. Besides, it commands the downshifts as well with optimal efficiency and power.

It reduces the gear hunting significantly to suffice the system’s requirements for exceptional performance. Usually, this product will help provide complete control to the user while driving, racing, and towing.


  • Suitable for off-road driving
  • Reliable support for towing
  • Swift fixing process
  • Maintains the shift points of the transmission


  • Lacks OE-quality finishing


If you stick to the installation instructions thoroughly, it will take around twenty to thirty minutes to finish the task.

FPE’s tap shifter is one of the worthy upgrades that you can get to boost the engine performance unswervingly.

19. SD-CAI-LB7 Cold Air Intake Kit by Sinister Diesel: Best Material Composition



Product Features

  • CNC mandrel bent tubing
  • Made with top-quality aluminum
  • Effective turbo spooling-up
  • Ideal for driving, towing, and racing
  • Blue-colored surface
  • Polished finish with power-coating

Product Specifications

  • Brand: Sinister Diesel
  • Model: SD-CAI-LB7
  • Weight: 1 pound
  • Dimensions: 10 x 10 x 6 inches

Product Description and Performance

Sinister Diesel’s SD-CAI-LB7 offers steadfast support to the user while driving, street racing, and towing heavy loads.

Furthermore, it comprises high-precision CNC mandrel bent tubing of premium aluminum that ensures the perfect fitting of the component.

There is an oversized oiled media containing cotton filers for a long-lasting and reliable application of the product.

“However, this cold air intake kit comes with silicone couplers to surpass the OEM material quality and performance. You will also get the basic hardware for the installation purpose that you can use with the other supplementary tools.”

An excellent feature of this cold air intake kit is that it improves the throttle response and boosts the turbo. Yet the icing on the cake is the blue finish surface with a sleek texture.

More to say, the surface is polished and has a coating of powder for supreme protection against the unavoidable damages with regular usage.


  • Resilient and unfailing application
  • Power-driven performance
  • Superiorly unmatchable strength
  • Enhances the throttle response


  • No installation manual is given with the product


One of the most eye-appealing aspects of this cold air intake kit is the polished blue tinge with powder coating. To get the most out of the air intake performance, one must fix it well into the vehicle’s system.

For this, use the silicone couplers along with basic installation hardware.

20. 28500 Dash Pod from Edge Products: The Ultimate Dashboard for CTS2 and CS2 Devices



Product Features

  • Superior quality plastic construction
  • No deformation or warping in direct sunlight
  • Perfect fit and finish
  • Angled to have an easy viewing
  • Vacuum formed

Product Specifications

  • Brand: Edge Products
  • Model: 28500
  • Weight: 10.1 ounces
  • Dimensions: 5.00 x 5.00 x 5.00 Inches

Product Description and Performance

If you are looking for a different upgrade to the LB7 Duramax truck, this is one of the best dash pods you can have. You can mount a screen on the dashboard surface of your vehicle.

“28500 dash pods from Edge Products fits perfectly for CTS2 and CS2 gadgets. Besides this, it also works well with GM Chevrolet 2001 to 2007 models. Above all, these are customizable pods which can be painted to match the color of truck’s interior.”

Edge Products dash pods fit perfectly into the molding and do not yield to high warp and heat due to the plastic material used.

Furthermore, the plastic material used to construct the pods protects the damage from direct sunlight.


  • Easy fit into the molding without any hassle
  • Goes well with various Chevrolet and GMC vehicles
  • Attractive finishing and shape
  • Resist damage from direct sunlight
  • Angled for a better view


  • Velcro adhesive stickers do not hold due to melting
  • Malfunctions reported for CTS even with an adapter


You will not get CTS2 with the kit. Hence, be prepared to purchase one before buying Edge Products dash pods.

Buying Guide

First and foremost, it is not mandatory to repair the engine and not everything will need an upgrade. It is always beneficial to choose those that you need.

With so many products already available in the market, this buyer’s guide will help you identify the essential ones. If you want the LB7 Duramax upgrades, some aspects will help you out.


Consider the use of the vehicle before carrying out the upgrades. You need to do a lot if you aim to participate in competitions. Also, you will need a tuner.

Hence, it would be a great help if you surf through the internet or read around to purchase a tuner for a specific use.

There is the availability of different reports that will provide varied information and do not rely on the first one. Always read a few pick up the most liked one and then reach a consensus.


The vehicles are manufactured in different years; hence, there is a possibility of difference when parts arrive. There might be a slight difference, but even it can make a lot of difference.

A component that is somewhat big or small will not align and impair the engine. You may also need fittings and again, the minor difference could be a costly fault. Always get the appropriate type and never opt for a similar one.


The vehicle stage could be the most crucial feature even if the budget has been selected for buying. However, the engine can cover many miles; there will be a stage when it is vital to consider cost vs. durability.

In summary, it would be better to minimize changes to be made if the vehicle is coming to the end of its utility. For this to happen, choose requirements rather than needs.

Replace the LB7 Duramax performance upgrades with safety upgrades to enable the truck to run for a more extended period.


Firstly, it is wise to buy the aftermarket products as these will cut down the cost. Other parts can wait for a while, but some parts, such as the cooling system, require immediate heed.

Moreover, it will be easier for you to locate parts in a cost-effective range by conducting thorough research and analysis. Before you buy these, it is worth examining your vehicle.

Also, go through the reviews and read them correctly to point out issues, if any, that you could experience. Although there is no harm in purchasing parts from the manufacturer, always assess the quality and not compromise.

Try to find out the reason if they appear of inferior quality.


The cost factor of fitting plays a vital role while buying parts. Besides, arrange for help in this regard instead of sending a hefty sum of money on fitting. Avoid visiting the garage or dealership unnecessarily for all upgrades.


Those people will be able to understand the challenges which previously have an LB7 Duramax.

Similarly, it would help if you focused on specific areas which need an upgrade as these will not last for a more extended period in the absence of upgrades.

Frequently Asked Questions

Is LB7 Duramax worth buying?

If there are problems with the truck, many can be dealt with relatively quickly. The use of the truck can be accountable in this regard.

The LB7 can overheat if towing happens a lot. Usually, the fan is responsible, and when it does not function properly, there is no cooling.

The heater could be the leading cause; hence you should always keep it clean to avoid failures.

With new vehicles, you can expect 350,000 miles, but at the same time, things are altogether different in the case of the old ones. Hence, LB7 Duramax is worth buying.

Is LB7 Duramax a perfect engine?

The LB7 is a very consistent and efficient engine except for the errors produced by injectors. Elsewhere, the truck will only require simple maintenance and last for a longer duration.

What are the best elements of the LB7?

While surfing through the internet, it has been noticed that people often discuss the good and bad features of their vehicles.

Overall, the comments made a tremendous difference in appraising the vehicle for the traveling distance – it can run and run.

As LB7 is one of the more affordable models, its cost is an advantage. The sound is enjoyable, as it is regulated optimally.

There might be several other reasons for people to opt for this brand. But the more people who admit their pros, the more you will rely on the appraisal.

What is the durability of the LB7 Duramax?

GM has given a 95 percent rating at 200,000 miles to the engine. Similarly, it means that 95 percent of all engines should reach 200,000 miles of service, based on robustness.

Is Duramax a better option than Cummins?

Cummins has a horsepower at 350, whereas Duramax comes in a higher horsepower at 445. Besides, the Duramax LB7 is also quieter than Cummins, with a 38 percent reduction in sound.

From where can I obtain the fitting advice?

Overall, you will be getting advice from the people when the issue of fitting comes in. It may either be a YouTube tutorial or an article. Firstly, you have to visit the local garages to understand the charges for accomplishing the task.

Can  I buy LB7 Duramax online?

Yes, you can buy LB7 Duramax online as authentic online stores sell everything needed for the LB7 Duramax.

In this way, you can compare the prices, time, and brand without leaving your house to purchase from the offline market. However, online buying involves shipping costs also.

If you are purchasing new parts online, there is no problem due to the description.

Are upgrades cost-effective?

The upgrades are primarily reasonable; however, this entirely depends not only upon the parts but also on the brand. Some will cost more and others less, but it has been observed that parts are usually economical.

Which upgrade should you focus on first?

The cooling system should be upgraded first. Nevertheless, it tends to be the first one of the systems not to function to an extraordinary level.

As all drivers will want something different from the car’s performance, it may be better to set out expectations and then decide what to do to reach the optimum driving experience.

What are the leading causes for upgrading?

The main reason is time. Nothing lasts for a more extended period. Hence, it is advisable to make upgrades at the earliest.

Moreover, it can be a costly affair if you have to make many changes simultaneously. You could give your vehicle a new lease of life by investing a small amount of money.

Besides, you will feel as if it is your new truck when you drive it.


Overall, the LB7 is a very consistent and efficient engine. Finally, it is you who have to choose the LB7 Duramax.

Each of the upgrades mentioned above is vital and indispensable to do. However, it would be of help if you conduct financial planning first and devise the budget accordingly.

This is important if you cannot carry all the upgrades at one go and prefer doing them at fixed intervals. Also, pick up the appropriate replacement parts judiciously for your vehicle.

By so doing, you will streamline the installation task and invest your money sensibly. Moreover, you will enjoy driving the car with new parts.

It has been observed that some upgrades result in saving money in the long run. Hence preliminary outlay is worth it. For now, enjoy the ride with your loved ones after the LB7 Duramax upgrades.

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