New Edelbrock Cylinder Head for GM 6.6L Duramax Diesel Engines. Edelbrock proudly introduces its first-ever high-performance cylinder head developed especially for the diesel engine market! The all-new Edelbrock Diesel Cylinder Head #79029 for 2001-2004 (LB7) GM 6.6L Duramax V8 engines is a direct bolt-on replacement for any street or off-road application where higher levels of performance and durability are desired. This aluminum head comes complete and ready to run straight out of the box and are designed to fit all variations of the Duramax engine that was offered in the popular Silverado and Sierra pickup truck as well as Chevrolet and GMC 2500/3500 HD trucks between 2001 and 2016. Edelbrock's new Diesel Cylinder Head is compatible with all stock Duramax valvetrain components as well as valve covers water crossover injectors and plugs. Each A356 aluminum cylinder head casting is heat- and pressure-treated to reduce porosity while also increasing both strength and fatigue properties. Intake and exhaust runners are designed to optimize flow and swirl but engine builders and head porters will also appreciate the extra deck and port wall material for custom porting and deck strength. Best of all the new Edelbrock Diesel Cylinder Head is CARB legal making them the perfect choice for a street performance upgrade to your Chevy or GMC Duramax Diesel engine. Order Edelbrock part number 79029 for 2001-2004 LB7 Duramax V8 engines. Features & Benefits: 50-state emissions legal. Designed cast machined and assembled in the USA. Injector cups are integrated into the castings for LB7 applications. Castings are treated to Hot Isostatic Press (HIP) process for strength. Heat-treated to T7 hardness for the extreme diesel operating environment. Thick 15.5mm deck for increased cylinder pressures. Raised rocker valley adds water volume in head. All factory components bolt on without modification