GM Duramax LML 6.6L (2001-2022)

A simple way to block EGR flow and reduce soot buildup. This stainless steel EGR Blocker Shim Kit is designed for 2011–2016 GM 2500HD/3500HD trucks equipped with the 6.6L Duramax LML. It provides a straightforward EGR block-off solution using prec...

The legendary Mini Maxx V1 tuner is back—better than ever. Originally the tuner that revolutionized diesel performance, this updated version delivers advanced tuning capabilities, a high-resolution screen for easy navigation, and shift-on-the-fly...

Unlock the performance potential of your 2015.5–2016 Duramax 6.6L with this 4" or 5" Downpipe-Back DPF Delete Exhaust System. Built from T409 stainless steel, this system replaces restrictive factory components—including the catalytic converter an...

Unlock your truck’s full capability with the EFILive AutoCal V3 DPF Delete Tuner, complete with Black Bandit custom tuning. Built for GM Duramax 6.6L engines, this tuner delivers horsepower gains, improved fuel economy, and real-time control, ens...

Introduction Protect exposed wiring after emissions modifications with the Duramax DPF Delete Plug Kit (2011-2023). Designed for GM/Chevy 6.6L LML, LGH, L5P and L5D engines, this kit seals unused exhaust and EGR connectors to block out moisture, ...

Bring back the boost your Duramax was built to make. If your turbo is showing signs of wear—slow spool, inconsistent power, or oil-related issues—this direct-fit replacement restores strong, predictable performance. Built for work-truck duty and d...

Eliminate intake restriction and restore smooth airflow. Designed for 2011–2016 6.6L Duramax LML trucks, this billet throttle valve delete replaces the factory grid heater throttle assembly that can restrict airflow—especially on tuned or modified...

Control crankcase pressure. Protect your intake system. This CCV (Crankcase Ventilation) Upgrade Kit is designed for 2012–2016 6.6L Duramax LML trucks and replaces the restrictive factory crankcase ventilation assembly. By properly venting blow-by...

Increase airflow. Reduce heat. Support stronger boost delivery. This upgraded Intercooler Pipe & Boot Kit is designed for 2011–2016 6.6L Duramax LML trucks and replaces restrictive factory charge piping with larger-diameter aluminum tubing and...

Serious clamping strength for serious Duramax builds. This Gator Heavy-Duty Head Stud Kit is designed to reinforce the cylinder head sealing system on 6.6L Duramax engines from 2001–2016. Whether your truck tows heavy, runs aggressive tuning, or s...

Upgrade airflow, power, and under-hood style.This performance cold air intake system is built specifically for 2013–2016 GM 6.6L Duramax LML trucks. Featuring 4" aluminum piping and a wrinkle black finish, it’s engineered to improve throttle respo...

Increase exhaust flow and unlock stronger performance with a stainless race exhaust built for the Duramax LML. This Downpipe-Back Race Exhaust System is designed for 2011–2015 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with t...

Upgrade your 2011–2015 Duramax with this 3" stainless steel downpipe designed to increase exhaust flow and unlock more turbo efficiency. Compared to the restrictive factory pipe, this high-flow replacement delivers up to 20% better airflow, helpin...

Unlock improved performance and reliability with the Duramax LML EGR Cooler Delete Kit, built specifically for 2011–2016 GMC Sierra and Chevrolet Silverado 2500/3500 trucks. This kit removes the restrictive EGR system, reducing carbon buildup, pre...

The Duramax LML EGR Delete Kit is a proven upgrade for 2011–2014 GMC Sierra, Chevrolet Silverado 2500/3500, and Savana/Express Vans. This kit completely removes the restrictive factory EGR system, helping to improve performance, reliability, and e...

Boost performance and reliability with this passenger side up-pipe for 2001–2016 Duramax 6.6L engines. Featuring a larger 2" diameter and durable stainless steel construction, this up-pipe replaces the OEM pipe that often develops leaks at the bel...

Unlock On-The-Fly Power for Your Duramax Boost performance and drivability with our premium DSP5 SOTF Switches, designed for seamless integration with EFI Live DSP5 tuning. These switches allow you to change tunes instantly while driving—no reflas...

Expand your EFI Live AutoCal with this Tune Package, engineered for GM Duramax trucks. Perfect for adding another vehicle to your existing AutoCal, this package provides custom tune files and optional SOTF (Shift-On-The-Fly) switch for real-time c...

Upgrade reliability and performance with a proven CP3 fuel system. The Duramax LML CP3 Conversion Kit replaces the weak CP4 fuel pump on 2011–2016 Duramax 6.6L engines with the highly reliable CP3 pump. This upgrade not only improves performance b...