2003-2007 5.9L Cummins Fleece Freedom Series Cylinder Head (Street)

Freedom Series cylinder heads are manufactured in Fleece's 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. Plus, the 11 screw in freeze plugs ensure you’ll never worry about a coolant leak under the valve cover again. Perfect for a daily driver or heavy duty towing, Fleece Performance Street heads are rated for use up to 700hp.  If your engine configuration is exceeding factory RPM limits, a Performance Series head with higher valve spring rates is required. 

* Head gasket not included. We recommend the use of Cummins 3958645 or Fleece Performance FPE-CUMM-HG-5.9.

** Core and crate return required - all paperwork & instructions for return included with the new cylinder head. Read Fleece's core charge policy here. You are responsible for all return shipping costs of the core. 

*** FOLLOW ALL INSTALLATION INSTRUCTIONS; Valve lash required. Back off adjusters on rocker arms or damage will occur to the cylinder head. For all applications over stock horsepower we recommend the use of ARP625 or ARP L19 12mm head studs.

**** When utilizing aftermarket head studs, lower rocker box cover modifications are required.  Reference ARP INSTALLATION METHOD INSTRUCTIONS.

***** ALL CUMMINS CYLINDER HEADS SHIP GROUND FREIGHT. BASED ON YOUR LOCATION THE SHIPPING TIME IS TYPICALLY 3-5 DAYS BUSINESS DAYS.