Freedom Series Cummins Performance cylinder heads. Each head is manufactured in our state-of-the-art cylinder head machine shop and guaranteed to meet or exceed factory specifications. All heads are inspected, pressure checked, decked, painted, and ready for installation. Plus, the 11 screw in freeze plugs ensure you'll never worry about a coolant leak under the valve cover again. Whether you are sled pulling, drag racing, or just looking for extra power when towing our 5.9L Performance will get you the power you need and are rated up to 1,100hp! Freedom Series Performance heads Include: Fire ring the cylinder head (All in the head) 11 screw in freeze plugs (eliminates coolant leaks) Hardened, oversized press in valve seats New valve guide liners 1.300" stainless steel alloy intake valves 1.300" inconel alloy exhaust valves 105 valve springs and steel retainers Fire ring gasket kit with multi-layer steel gasket and 4.550" diameter rings Core and crate return required - all paperwork & instructions for return included with the new cylinder head. Read our core charge policy here. You are responsible for all return shipping costs of the core. FOLLOW ALL INSTALLATION INSTRUCTIONS - Valve lash required. Back off adjusters on rocker arms or damage will occur to the cylinder head.

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