LBZ Duramax Engine Parts

Restore factory reliability or build a high-horsepower competition motor with our comprehensive selection of 2006–2007 Chevy Silverado and GMC Sierra 2500HD/3500HD LBZ Duramax engine parts. The 6.6L LBZ is legendary for its raw power and durability, but high-mileage wear, heavy towing, and aggressive performance tuning will eventually require a top-end overhaul or a complete engine rebuild. Whether you need an upgraded EGR cooler to replace a clogged factory unit, durable silicone engine mounts to lock down a high-torque build, or you are looking to dive deep into your engine block with upgraded cylinder heads, forged rotating assemblies, and high-strength ARP studs, we have exactly what you need. This category serves as your central hub for all LBZ internal engine components, featuring dedicated subcategories for gaskets and seals, exhaust manifolds, oil pans, valvetrain hardware, and charging systems. We proudly supply premium engine parts and complete rebuild solutions from trusted industry leaders like PPE, Dorman, Mahle, ARP, and Fleece Performance. Browse our complete inventory of 6.6L LBZ engine parts and subcategories below to ensure your Duramax runs stronger and longer than ever before.