TrackTech makes one of the most reliable and durable engine families on the planet, Chevy Duramax, even more reliable and durable with best-in-class head studs, bolts, head gaskets, and various other diesel parts. GMC’s Chevrolet Duramax is beloved throughout the world for its reliability and durability. Chevy Duramax has had its fair share of powerful 6.6 liter V8 diesel engines ranging from the LB7, LLY, LBZ, LMM, LML, and as of latest, the L5P. And if you’re looking to make your Duramax even more reliable, or maybe even boost its performance, TrackTech has a variety of lab-tested and lap-tested parts to offer. Our head studs, head gaskets, nuts, and bolts are high-quality, world-class diesel performance parts. TrackTech studs and bolts are created to withstand a tremendous amount of pressure without moving even the slightest amount. No matter how much you push your truck, the parts held together with our bolts will not budge.