5.9L Freedom Series Cummins Cylinder Head Performance Fleece Performance

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. In addition, the 11 screw in freeze plugs ensure that you will 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
• Manley 1.300 inch stainless valves
• 105 valve springs and steel retainers
• Fire ring gasket kit with multi-layer steel gasket and 4.550 inch diameter rings

Core and crate return required - all paperwork and instructions for return included with the new cylinder head. Please read our core charge policy here. You are responsible for all return shipping costs of the core.
Please follow ALL installation instructions; valve lash is required. You must back off adjusters on rocker arms or damage will occur to the cylinder head.