The Fleece Performance 01-04 GM Duramax LB7 Freedom Cylinder Head with Cupless Injector Bore is a high-performance replacement component designed for the LB7 6.6L Duramax engine. Constructed from a new aluminum casting in Fleece’s state-of-the-art Freedom Racing Engine shop, this cylinder head features a cupless injector bore, eliminating the need for injector cups and reducing the risk of leaks. Each head is meticulously assembled, pressure and leak tested, and equipped with new valves, valve guides, springs, and valve seals to ensure durability and optimal performance. This head guarantees to meet or exceed factory specifications, making it an excellent upgrade for both daily driving and towing applications. Its design enhances reliability and simplifies installation, providing a cost-effective solution for engine rebuilds and performance upgrades.
Designed specifically for 2001–2004 GM Duramax LB7 engines, this cylinder head is a direct replacement for the driver side position. It is compatible with models equipped with the LB7 6.6L engine and is ideal for use in street, towing, or performance applications. Installation requires using the recommended GM 12637788 head gasket (Grade C, Right) and GM 12637785 head gasket (Grade C, Left). The head is suitable for those seeking a reliable, leak-proof upgrade that improves engine longevity and performance. It is intended for use in engines that demand high durability and precision, providing a seamless fit and enhanced efficiency for the specified vehicle range.
