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Manley's Platinum Series forged pistons for 2004+ Subaru WRX/STi (EJ257) are specified with a 79mm stroke, 99.55mm bore and an 8.5:1 compression ratio with a -17cc dish. These pistons use domestic 2618 alloy forgings and include premium chrome moly wrist pins, with moly skirt coatings on select SKUs and precise ring land and groove machining for improved ring seal and durability.
Manley 04+ Subaru WRX/STi (EJ257) 79mm Stroke 99.55mm Bore 8.5:1 -17cc Dish ED Piston Set
