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. These heads are rated for 700 HP ready to bolt on and go! **Heavy Duty Heads come with Fleece 105 Valve Springs & Heavy Duty Tool Steel retainers to ensure you have a long lasting cylinder head! 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!