JE Pistons and Rings 100 Bore 79mm Stroke 9.5:1 Comp Subaru WRX / STI EJ257 2004-2021 vendor_Magnaflow Performance To help improve the flow

To help improve the flow of air into the radiator

and overall strength of your motor

however we can not guarantee fitment with other companies gauges

Part #: BSR49

JE Pistons and Rings 100 Bore 79mm Stroke 9.5:1 Comp Subaru WRX / STI EJ257 2004-2021 vendor_Magnaflow Performance To help improve the flowPart #: 310938 JE piston 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: SUBARU EJ257 TIME ATTACK "FSR" NOTE: NOW COMPATIBLE WITH EITHER OEM OR AFTERMARKET RODS! SOME BLOCKS MAY REQURE CLEARANCING FOR