Forged from high-silicon alloy for maximum strength and dependability Wiseco offers a complete range of popular piston models and years for both trail and racing applications All Wiseco pistons are priced with rings and circlips WISECO FEATURES PRO-LITE PISTONS Deliver durability, longevity and increased horsepower Innovative forging design and piston skirt provide maximum horsepower and torque (box)Formula for computing cubic centimeter displacementD = Bore Size in Inches S = Stroke in Inches N = Number of CylindersD(2) x .7854 x S x N x 16.387 = CC DisplacementPRECISION MATCHED AND BALANCED PISTON AND GASKET KITS Contain all the necessary components for overboring or rebuilding your top end Feature forged pistons, rings, wrist pins, circlips and top end gasket set Cylinder sleeves must be purchased separately