GM Duramax LBZ 6.6L (2001-2021)

Maximize exhaust flow, lower EGTs, and unlock real performance from your early Duramax. This 4" or 5" Downpipe-Back Race Exhaust System is built for 2001–2007 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax e...

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...

The Duramax LBZ EGR Valve & Cooler Delete Kit is designed to eliminate the restrictive and failure-prone factory EGR system on late 2006 to early 2007 Duramax LBZ 6.6L engines. By removing the EGR valve and cooler, this kit improves airflow, r...

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...

The Duramax LBZ/LMM Y-Bridge Kit replaces the factory intake bridge, which is prone to blowing apart under boost and causing drivability issues. Built with heavy-duty materials and a high-flow design, this kit improves airflow, lowers exhaust gas ...

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...