Includes head shell, domes, and orings. Head shell is clear anodized for protection against corrosion. This head is completely sealed by orings, no head gasket required. Dual water outlets for additional cooling.
The stock head on a 2003 SXR800 measured 32.7cc with the head gasket(31cc head volume + 1.7cc gasket volume). The assembled volume was 35cc for an uncorrected compression ratio of 12.2:1. The stock squish clearance measured approximately 0.085" with a 0.035" relief in the stock head at 80.25mm diameter. The stock head gasket measured .0125" thick. Stock compression was 177psi in the front and 174psi in the rear, measured at 1200ft elevation. The top of the stock exhaust port measured 1.6" from the top of the cylinder.