Sinister Diesel - GM Duramax

Sinister Diesel is your number one source for high-performance parts and maintenance supplies for your Chevy or GMC Duramax diesel truck. Whether you’re looking for increased performance from your engine, better fuel economy, or some eye-catching style, you’ll find what you’re looking for within our extensive inventory. Click on the category of your choice and get started browsing our huge selection of power-adding product including cold air intakes, turbo kits, and plug-in tuners; replacement parts like our improved EGR coolers, replacement fuel injectors; along with all the gaskets and seals you need for a leak free engine. We can even get you the tools required to get the job done right the first time.

If you have any questions about the products that we carry, give one of our on-staff Duramax experts a call, send us an email, or chat with us live on our website. At Sinister Diesel it’s our mission to make sure that you always get the right parts for the right application so you can keep your GM Duramax diesel truck running strong for miles to come.

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Air Intakes & Parts for Duramax

To get the best performance from your Chevy or GMC Duramax diesel engine, it needs the densest and coolest air in the smoothest way possible. Sinister Diesel can provide you with Duramax air intake...More Details »

Differential for Duramax

EGR Coolers & Components for Duramax

The stock EGR cooler that comes equipped on your GM Duramax engine can divert up to half of the exhaust into the intake to help reduce emissions during everyday driving. But when you’re demanding...More Details »

Engine Parts and Performance for Duramax

A good maintenance schedule is the best way to keep your Duramax-powered Chevy or GMC truck on the road and working hard. But years of abuse and high performance can eventually take its toll on...More Details »

Exhaust Systems / Manifolds for Duramax

Improve the Look Whether you want to replace your Duramax’s full exhaust system or just make improvements one section at a time, Sinister Diesel has what you need. From the headers down to...More Details »

Exterior Accessories for Duramax

Filters / Fluids for Duramax

Gauges and Pods for Duramax

Injection Pumps for Duramax

Injectors for Duramax

The diesel injectors used in the Duramax diesel engine are electronically controlled and are more reliable than ever. But like nearly every other part of your truck, your diesel injectors are...More Details »

Intercoolers & Pipes for Duramax

The intercooler and charge piping system under the hood of your Duramax-powered Chevy or GMC truck has an important job helping your engine make the most power it can. Unfortunately, the factory...More Details »

Interior Accessories for Duramax

Lift Pumps & Fuel System for Duramax

Pushing your Chevy or GMC Duramax diesel beyond its factory power levels is going to require a more robust fuel system. Part of this upgrade should include an aftermarket Fuel Lift Pump to help you...More Details »

New Duramax Products

Offroad & Recovery for Duramax

Packages for Duramax

When shopping for your next maintenance or power-adding projects for your Duramax-powered truck, make sure you check out the packages below. No one but Sinister Diesel can make it easier to order...More Details »

Suspension for Duramax

Tools for Duramax

Towing Accessories for Duramax

Transmission for Duramax

Modified Chevy or GMC Duramax diesel trucks can have a hard time getting every bit of horsepower and torque to the wheels with a factory stock diesel transmission. That’s why an upgraded diesel...More Details »

Tuners & Programmers for Duramax

Performance Diesel Tuners for Your GM Duramax Unlocking the hidden potential from your Duramax diesel has never been easier than with a plug- in performance tuner. Our diesel tuners can be...More Details »

Turbos & Twin Turbo Kits for Duramax

Choosing the right single or twin turbo kit is one of the most important, yet misunderstood, technical aspects of Chevy and GMC Duramax turbo diesel performance tuning. With enough fuel, you can...More Details »