JE Pistons and Rings 99.5 Bore 8.5:1 Comp Subaru WRX / STI EJ257 Block W/ EJ20 Head 2004-2021 FX45_2003-2005 75A durometer polyurethane

75A durometer polyurethane

Choice of ARP2000 or ARP 625+Fasteners

tuned and dyno-tested to fit specific Subaru WRX

Blouch Turbo also requires TGV deletes to be used with the 5

ARP studs are thread rolled after heat-treat

JE Pistons and Rings 99.5 Bore 8.5:1 Comp Subaru WRX / STI EJ257 Block W/ EJ20 Head 2004-2021 FX45_2003-2005 75A durometer polyurethanePart #: 291059 JE Pistons and Rings SUBARU EJ257 BLOCK WITH EJ20 HEAD "FSR" New high strength FSR forging design! JE Pistons new FSR forgings are both strong and lightweight! The new FSR design has undergone extensive on track testing to ensure flawless performance under the most demanding conditions for your Subaru WRX. Features: 2618 T6 high tensile forged aluminum Specifically engineered for high horsepower Subaru engines Dome and dishes feature