JE Pistons SUB STI EJ257 99.5mm Bore CR 8.5 *Single Piston*

JE Pistons SUB STI EJ257 99.5mm Bore CR 8.5 *Single Piston*

Regular price $162.81 Sale

JE Pistons are specifically engineered for extreme applications up to, and including, professional competition. In this environment, higher compression ratios, extreme boost levels and heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy found in every JE Piston. *Application Specific Forgings for an Optimized, 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 and Wire Locks Included *JE ProSeal Piston Rings are included with your JE Pistons Pistons are sold INDIVIDUALLY for replacement or test fitting purposes. *Custom Applications are also Available

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