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The Wiseco Professional Series forged piston for Subaru EJ257 WRX/STI 4-valve engines is a single replacement sized to a 99.50 mm bore with 1.209 in compression height. Suited for high-boost or race builds and supplied with premium rings, it prioritizes durability. Forged from 2618 aluminum and machined in the USA, it includes ArmorGlide skirt coating, precision ring grooves, anti-detonation groove and forced pin oiling.
Wiseco Subaru EJ257 WRX/STI 4v Dish -19cc 99.5 Piston Shelf Stock
