CP Pistons understands that Sport Compact engines have unique requirements. Specially designed forgings are used to maximize strength, minimize weight and accommodate smaller pin diameters and lengths. Higher cylinder pressures need better ring sealing and CP Pistons mirror finish, multi-step ring groove procedure ensures optimal performance. Our specially designed skirt cam and barrel shapes allow tighter clearances and reduced friction. All our off-the-shelf sport compact pistons are made to accommodate over-sized valves and higher lift cams.