Engine

Active filters
Precision cam shims for accurate valve adjustment. Made in the U.S.A.
Enhances the center of the oil cooler trim with a stylish guard. Easy to install and built in the USA.
Dresses up the oil cooler area with matching vent‑screen material; easy to install. Made in the USA.
Shields exposed hoses from abrasion and heat; durable spring steel construction and made in the USA.
Protects hoses from abrasion and heat.
Made in the USA.
Durable hose protector that shields hoses from abrasion and heat. Made from stainless spring steel. Made in the USA.
Directs air through a side scoop to cool cylinder heads; includes a high-powered waterproof fan, temperature switch (activates at 140°F), manual override, wiring and hardware. Plug-and-play installation with no drilling. Not for "Twin Cooled" models.
Includes top and second compression rings plus three-piece oil control rings; supplies enough rings for two pistons for reliable sealing and oil control.
Complete replacement ring set with top and second compression rings plus three-piece oil control rings. Restores compression, controls oil, and improves oil economy. Includes enough rings for two pistons. Made in the USA.
Complete set of top, second, and three-piece oil control rings for two pistons. Barrel face top rings and Napier second rings provide improved sealing and heat transfer; three-piece Flex Vent oil rings ensure positive oil control. Made in the USA.
Complete replacement piston ring set with PVD coating: barrel face top rings, Napier second rings, and three‑piece flex vent oil control rings. Includes enough rings for two pistons.
Direct-fit piston pin clips for many Harley models. Made in the USA and built to OEM-equivalent standards.
Precision-machined spacer for motor sprocket shafts. Made in the USA.