32 press-in iron matrix valve guides ensure superior lubrication retention and longevity
Heavy-duty, blueprinted casting with higher nickel content and thicker deck surface for increased rigidity
USA-made valve springs, retainers, locks, valve stem seals, freeze plugs, glow plug sleeves, and injector sleeves for consistent performance
Summarized by Shop
Our popular O-ring heads start off with a 100% brand new casting made just for us, to our exacting specifications. We have improved several key design flaws with the factory cylinder heads - KDD castings incorporate a higher nickel content and thicker deck surface for a more rigid casting, and hardened alloy valve seat inserts (to preven
Fitment
Ford 6.4 Powerstroke engines (2008-2010)
Material
Metal, Stainless steel, Aluminum (varies by model)
Valve Inserts
32 tungsten carbide hardened inserts
Valve Guides
32 press-in iron matrix, diamond honed
Valve Springs
USA-made, pressure tested and balanced
Warranty
12 months against defects in quality and workmanship