Engine

Active filters
Precision cam shims for accurate valve adjustment. Made in the U.S.A.
High-strength forged piston kit with premium wrist pins, carbon steel wire lock and JE Pro Seal rings.
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.
High-strength piston kit with premium wrist pins, carbon steel wire lock and JE Pro Seal rings.
High-strength forged piston kit with premium wrist pins, carbon steel wire locks, and sealed rings for durable performance.
Direct-fit piston pin clips for many Harley models. Made in the USA and built to OEM-equivalent standards.
Designed for twin plug heads. Accepts .650"/10mm x 1.0 compression release valves. Sold each.
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.