In the process of rebuilding your tired Duramax? Give new life to your engine with a set of Freedom Series cylinder heads from Fleece Performance. Each cylinder head is manufactured in Fleece's state-of-the-art Freedom Racing Engine shop and is guaranteed to meet or exceed factory specifications. All heads are meticulously inspected, pressure and leak tested, and are equipped with new valve guides, springs, valve seals and cupless injector bores. The cupless design eliminates the chance of leaks forming at the injector cups that the factory design is known for. Perfect for the daily driver or towing application, these heads utilize stock valves with a 45 degree angle on the intake and exhaust ports. Now available with no core charge!