JE pistons are specifically engineered for extreme applications and professional competition. In this environment the higher compression ratios, higher boost levels and heavier nitrous usage necessitate the need for higher tensile strength 2618 aluminum alloy. There features include, uniform crown thickness, contact reduction groove to minimize frictional drag, accumulator groove for increased top ring stability and sealing, CNC-machined side relief with lower support band for additional skirt strength. Honed pin bores, double pressure fed pin oilers, wire locks, and premium performance piston rings are also included.