The Fleece Performance 01-04 GM Duramax LB7 Freedom Cylinder Head 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 suitable for both daily driving and towing applications. Its design enhances reliability, reduces maintenance concerns, and improves overall engine efficiency.
Designed for 2001–2004 GM Duramax LB7 engines, this cylinder head is a direct replacement for the stock component on the passenger side. It is ideal for enthusiasts seeking a reliable upgrade for street or towing use, offering improved sealing and performance. Installation requires using the recommended GM 12637788 head gasket (Grade C, Right) and GM 12637785 head gasket (Grade C, Left). The head is compatible with the original engine configuration and is suitable for those looking to eliminate injector cup leaks while maintaining factory-level quality and performance standards. This product is perfect for rebuilds, repairs, or performance upgrades on LB7 Duramax engines.
