Engine

Active filters
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.
Precision-milled ignition cover; direct replacement for Harley-Davidson® models from 2017 with Millwaukee-Eight (M8) engines (107, 114 & 117).
Precision-machined billet cap with improved heat transmission and performance styling.
Strong, lightweight billet aluminum point cover with CNC precision and improved heat transfer.
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.
Designed for twin plug heads. Accepts .650"/10mm x 1.0 compression release valves. Sold each.
High-performance camshaft with Endurance Ramps for broad torque, reduced valve train noise, and billet steel construction.
Four-piece triple tree bolt set: two for the upper clamp and two for the lower clamp. Direct replacements for original zinc-plated bolts; uncoated to prevent flaking during tightening.
Forged performance replacement for stock hydraulic roller lifters. 100% tested and made in the U.S.A.