Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy Include pistons with skirt coating, rings, chrome piston pins and retainer clips High-tech manufacturing ensures greater operating strength and lower expansion at high temperatures High-tension compression rings with 3mm oil scrapper rails Offset pin design for smoother operation Replacement ring sets sold as a set for one piston Made in the U.S.A.. PISTON KIT 131" TC