A single Manley Platinum Series forged piston for 2004+ Subaru WRX/STi (EJ257) with 99.5mm bore and 8.5:1 compression, STD stroke, is built from 2618 alloy forgings and benefits from Manley’s proven cam and barrel skirt profiles. Standard chrome‑moly wrist pins, precise ring lands and machining fixturing are used to ensure ring seal, durability and predictable performance in high‑stress engine applications.
Manley 04+ Subaru WRX/STi (EJ257) STD Stroke 99.5mm Bore 8.5 CR Size B Piston (Single)