JE piston and ring designs are specifically engineered for extreme applications up to, and including, professional competition for your Subaru WRX. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy.

Dome/Dish requires no deburring or preparation

• 4 piston 
• 4 rings
• Pin fitting and Tru Arc locks