Engine
Active filters
- Bolt-on power: +40–50% on stock 107", 114" and 117" M‑Eight motors.
- Compressor and turbine housing with Garrett internals; plenum with integrated blow-off valve.
- Includes injectors, spark plugs, boost gauge with mount, oil feed/drain lines, custom cam cover, tune files, hardware and gaskets.
- Requires Thundermax ECM (sold separately). Does not fit Twin Cooled or non-removable fairing lowers. Offroad use only.
- Made in the USA.
High-quality OEM replacement components for cam bearing assemblies.
Essential shims for precise cam setup. Made in the USA.
Complete top-end piston rebuild kit with X-Ring package and hardware. Made in the USA.
ArmorX™ coating for reduced wear and ArmorFit™ skirt coating for smooth, quiet operation. Includes pistons, rings, pins and circlips. Made in the USA.
Forged pistons with generous valve pockets for big valves and cams.
Includes rings, piston pins and circlips for two pistons.
Force-fed pin oiling and a pressure-seal groove enhance sealing and durability.
Forged piston kit 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.
Forged piston kit with ArmorGlide™ skirts, rings, retainer clips, and chrome piston pins; Twin Cam ArmorPlating for added protection. Made in USA.
Transparent cam cover designed to match Assault series air cleaners. Made in the USA.
Precision sprocket spacers to restore chain alignment. Made in the U.S.A.
Precision spacers that improve drivetrain alignment and durability. Made in the U.S.A.
Durable spacers for cam drive sprockets that maintain chain alignment and extend component life.
Precision-machined spacers that ensure correct cam drive sprocket alignment and reduce wear. Made in the U.S.A.
Replacement ring set for one piston; verify piston compatibility before purchase.
Pack of five oil screens for Shovelhead engines, made in the U.S.A.
Precision dowel pins for crankcase and motor transmission case applications. Made in the USA.
High-quality OEM replacement bearing spacers for left-side crankcase applications. Made in the USA.