Fleece Performance and Freedom Racing is at it again with a new re-manned cylinder head for your 03 to 07 CR Cummins application. All heads are inspected, pressure checked, decked, painted, and ready for installation. All street heads come standard with 11 screw in freeze plugs to eliminate coolant leaks, oversized and hardened valve seats, new Cummins valve springs and valve guide liners. This performance head is also cut for fire rings and will include the fire ring gasket to install. These heads are rated for 1100 HP ready to bolt on and go! **Performance heads include everything above, with the addition of new Manley Stainless Steel valves, Fleece 105 valve springs & tool steel retainers. Also included is a fire ring head gasket set! Core Charge: Core of $500 applies to this order. This amount will be refunded to you once Fleece receives your core cylinder head and is marked as a "good" cylinder head. Shipping: Flat Rate of $200 to all lower 48 states applies, please contact us if you need a quote shipping out of the US!