Engine

Active filters
ArmorX™-coated pistons with ArmorFit™ skirt coating for smooth, quiet operation. Includes pistons, rings, pins and circlips. Made in the U.S.A.
Forged pistons with ArmorGlide™ coated skirts, rings, retainer clips, and chrome piston pins. ArmorPlating on Twin Cam pistons improves ring seal and detonation resistance. Made in the USA.
Transparent cam cover designed to match Assault series air cleaners. Made in the USA.
Replacement rings sold as a set for one piston. Verify piston compatibility before purchase.
Protects the oil pump and cam plate from debris. Ideal when doing cam bearing work. Does not restrict oil flow; lowers oil temperature 5–10°F. Easy to install and clean. For use with OEM oil pumps only.
Replacement piston rings for one piston. Fits Wiseco pistons only.
Replacement rings for a single piston; fit only matching pistons from the same manufacturer.
Heavy-duty, super-high-tensile alloy construction; reinforced in crack-prone areas; replaces two-bolt and four-bolt top case OEM mounts; fits over studs and starter shaft; made in the U.S.A.
Forged piston kit with complete X-ring package and installation hardware. Made in the USA.