JE Pistons and Rings 99.5 Bore 8.5:1 Comp Subaru WRX / STI EJ257 Block W/ EJ20 Head 2004-2021 FX45_2003-2005 The flywheel was created for

The flywheel was created for maximum strength

ARP studs are thread rolled after heat-treat

feature a replaceable 1045 high-carbon steel friction plate with AN military-grade fasteners and a hardened 1050 ring gear

Steel shock bodies are electroplated with zinc to resist rust and protect from the elements

Choice of ARP2000 or ARP 625+Fasteners

JE Pistons and Rings 99.5 Bore 8.5:1 Comp Subaru WRX / STI EJ257 Block W/ EJ20 Head 2004-2021 FX45_2003-2005 The flywheel was created forPart #: 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