Fleece Performance and Freedom Racing bring you the top-tier Performance cylinder head for the 2003–2007 common rail 5.9L Cummins. Every head is inspected, pressure checked, decked, painted, and ready for installation. Rated for 1100 HP and ready to bolt on.

The Performance head is the most capable build in the Freedom Series 5.9 lineup, adding Manley stainless steel valves, Fleece 105 valve springs, and tool steel retainers on top of the full Heavy Duty Street foundation. Critically, this head is cut for fire rings and includes a fire ring head gasket set — the sealing solution required for serious high-output builds pushing past what standard head gaskets can handle.

Performance head features: 11 screw-in freeze plugs, oversized and hardened valve seats, new Cummins valve springs, new valve guide liners, Fleece 105 valve springs, heavy duty tool steel retainers, new Manley stainless steel valves, fire ring cut, fire ring head gasket set included, 1100 HP rating, fully inspected and pressure checked, decked and painted, bolt-on ready.

Core charge: A $500 core charge applies to this order. This amount will be refunded once Fleece Performance receives your core cylinder head and it is marked as a good core.

Shipping: Flat rate of $200 to all lower 48 states. Contact us for a shipping quote outside the contiguous US.