The Fleece Performance Freedom Series cylinder head for the 6.6L Duramax is a remanufactured performance component designed to meet or exceed factory specifications. Manufactured in Fleece’s advanced Freedom Racing Engine shop, each head undergoes meticulous inspection, pressure testing, and leak testing to ensure quality and durability. Equipped with new valve guides, springs, and valve seals, these cylinder heads feature precision-ground stock valves with a 45-degree angle on both intake and exhaust ports. They are ideal for enhancing engine performance, reliability, and longevity in demanding applications. Suitable for both daily driving and towing, these heads provide a reliable upgrade for Duramax engines, combining factory-level quality with performance enhancements.
Designed for 2011–2016 GM Duramax 6.6L LML engines in 2500-3500 series trucks, these remanufactured cylinder heads are a direct replacement for OEM components. They are compatible with stock valves and utilize a multi-angle valve job for improved airflow and combustion efficiency. Perfect for use in towing, daily driving, or performance upgrades, these heads are bolt-on replacements that restore engine integrity and performance. The kit includes the remanufactured cylinder head, which has been pressure and leak tested to ensure quality. With a one-year limited parts warranty, these heads offer a cost-effective solution for Duramax owners seeking reliable, high-quality engine components.
