Wiseco's high-tech manufacturing ensures greater operating strength and lower expansion at high temperatures Kits include forged pistons with ArmorGlideÖ coated skirts, rings, retainer clips, and chrome piston pins Twin Cam pistons have ArmorPlating which improves ring seal, eliminates ring micro-welding, and improves the piston's ability to defend against detonation damage Pistons are made in the U.S.A. Replacement rings include rings for one piston only. Wiseco pistons that use VM-rings can only be fitted with Wiseco VM-rings; Wiseco pistons that use XC-rings can only be fitted with Wiseco XC-rings.. PISTON KIT 96 TO 110