This American Cylinder Head Remanufactured Engine Cylinder Head keeps you Ready for the Road Ahead™, complete with all valve guides, seals, and valves. Gain easy installation with all threaded holes being re-threaded as well as all guides, springs, and cam bearings being replaced with new components. This cost effective reman engine cylinder head undergoes a rigorous 10-phase inspection and manufacturing process to ensure durability you can count on for your heavy duty application. After final assembly, each cylinder head is again inspected for clean threaded bolt holes, surface finished, and signed-off for final inspection, giving you reliability you can count on.