Manley 632200CE-4 Piston Kit Set (04+ Subaru WRX/STI EH257 99.50mm Bore STD Size 8.5:1 Dish Extreme Duty) Manley Performance manufactures Stainless valves, forged pistons, camshafts, lifters, vanadium valve springs, push Rods and timing chain kits Made up of good quality products Manufactured in United States