Engine

Active filters
Compact universal fitting for joining flare and threaded connections. Easy install and durable performance.
Precision cam shims for accurate valve adjustment. Made in the U.S.A.
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.
Precision-milled ignition cover; direct replacement for Harley-Davidson® models from 2017 with Millwaukee-Eight (M8) engines (107, 114 & 117).
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.
Precision support discs for motorcycle bearing assemblies. Durable steel construction with corrosion-resistant finish. Made in the U.S.A.
Replacement dowel pins for precise alignment and secure assembly.
Precision-fit components that seal and secure engine tube assemblies. Made in the USA.
Direct-fit oil line for Knucklehead engines. Easy installation; professional fitting recommended.
State-of-the-art compression release valves that reduce hot starts and lower starter and battery loads. Sold as a set and made in the U.S.A.
State-of-the-art design to reduce hot starts and starter/battery loads. Custom molded knobs, sold in pairs, made in the U.S.A.