The Fleece Performance Freedom Series cylinder head for the 6.6L Duramax is a remanufactured performance component designed to meet or exceed factory standards. Manufactured in the company'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 stock valves with a 45-degree angle on both intake and exhaust ports, providing reliable performance for daily driving and towing applications. The heads are precision ground and include a multi-angle valve job, offering enhanced airflow and efficiency. Backed by a one-year limited parts warranty, these heads deliver consistent performance and longevity for demanding diesel engines.
Designed as a direct replacement for 2011–2016 GM Duramax 6.6L LML engines in 2500-3500 series trucks, these cylinder heads are suitable for both street and towing use. They are ideal for owners seeking a reliable remanufactured head that maintains OEM specifications while providing improved performance. The heads are bolt-on components, requiring no core charge, and are compatible with stock valves and components. Suitable for use in daily drivers or heavy-duty towing setups, these cylinder heads ensure optimal engine operation and durability under demanding conditions.
