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Stem Diameter (mm) Overall Length (mm) Head Diameter (mm) 6
Sprung hub design allows for moderate dampening in high-torque applications
Exhaust Pipe Polish
5mm thick wall 304 stainless steel offering a lifetime of performance and fun
JE 99.5mm 8.8:1 Billet FSR Piston Set (79mm Stroke) - Subaru WRX 2006-2014 / STi 2004-2021 (+Multiple Fitments) 2024 Stem Diameter (mm) Overall LengthJE's billet racing pistons for Subaru EJ257 engines were originally created for Ken Block's Gymkhana STI racecar and are now available to the public. The pistons are 100% CNC machined from high quality 2618 T6 wrought aluminum bar stock and are specifically designed for high horsepower road and drag race engines. The pistons feature internal and external bracing for improved durability and strength. A unique "donut dish" crown and application specific
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