Manley Subaru EJ257 99.75mm +.25mm Bore 8.5:1 Dish Platinum Series Piston with Rings

06-14 WRX / 04+ STi Platinum Series Piston - Single by Manley Performance Manley pistons are machined of high strength 2618 material. Each design is lightweight yet robust enough to deliver long service life. Perfect ring groove to skirt squareness is achieved through our unique "one fixturing" manufacturing method that assures maximum horsepower. Round wire locks, tool steel wrist pins, and rings are included with every set at no additional charge. Features Pin: Standard .180" Wall Bore Size: 99.75mm (+.25) Rod Length: 5.137" Stroke: 79mm Standard Stroke (2.5L) Comp Distance: 1.209" Dome Volume: -17 cc Cylinder Head cc: 57 Compression Ratio: 8.5:1 Piston Type: Dish Weight: 414 Grams Ring Set: 46997DT‑4 Benefits "Contour forgings" provide the optimum balance between strength and weight with no grain-interrupting internal milling. Proprietary multi-step top ring groove machining process assures optimum control of the groove's size, geometry, flatness, and finish. All final turning i