Manley Subaru WRX STI 26cc Dish Piston (Single Piston)

04-11 Subaru WRX 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: 83mm Stroker (2.7L) Comp Distance: 1.130" Dome Volume: -26 cc Cylinder Head cc: 51 Compression Ratio: 8.5:1 Piston Type: Dish Weight: 383 Grams 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 is performed in one fixturin