JE Pistons and Rings 100 Bore 83mm Stroke 8.5:1 Comp Subaru WRX / STI EJ257 2004-2021 vendor_Blouch Turbos the stock STI is designed

the stock STI is designed to be biased towards understeer

52mm (2 1/16")

Adjust gate pressure

ready-to-install package

JE Pistons and Rings 100 Bore 83mm Stroke 8.5:1 Comp Subaru WRX / STI EJ257 2004-2021 vendor_Blouch Turbos the stock STI is designedPart #: 291064 JE piston and ring designs are specifically engineered for extreme applications up to, and including professional competition for your Subaru WRX and STI. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy. Fitment: JE Pistons and Rings for SUBARU 2004+ IMPREZA STI , 2005+ FORESTER XT, LEGACY GT, 2006+ WRX EJ257 Features: 2618 T6 high