Dome/Dish requires no deburring or preparation, 2618 T6 high tensile forged aluminum. JE designs are specifically engineered for extreme applications up to, and including, professional competition. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy. Dome and dishes feature smooth flowing radii for excellent flame travel. 1.0 x 1.2 x 2.0mm, 1.0 x 1.2 x 2.8mm, and 1.2 x 1.5 x 3.0mm ring widths. .767 x 2.250 straight wall carbon steel wrist pin provided. Pin fitting and wire locks included. Rings Now Included

Compression Ratio with 32.5cc heads 9.0:1.