Manley 612000CB-1 04+ WRX STi (EJ257) Size (STD) Stroke (79mm) Bore (99.50mm Grade B) SINGLE Piston w/ Rings. Our signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers.
