The Fleece Freedom Series Cylinder Head with Cupless Injector Bore – Driver Side (FPE-61-10001-D-CL) is a high-performance replacement component designed specifically for 2001-2004 GM 6.6L Duramax LB7 engines. Engineered to address common factory shortcomings, this cylinder head features a cupless injector bore design that eliminates the need for traditional injector cups, reducing the risk of coolant leaks and injector-related issues. Manufactured from premium materials and precision-machined for superior fitment and durability, it is an ideal solution for both stock and high-performance builds. Each Freedom Series head undergoes rigorous quality control and is pressure-tested to ensure optimal sealing and long-term reliability. Whether you’re restoring your LB7 or upgrading for enhanced performance, the Fleece Freedom Series Cylinder Head offers exceptional craftsmanship and peace of mind.