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
- Manley 1.300" stainless 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.
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