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.
Durable points cover with precision fit for restoring and protecting the ignition assembly. Made in the USA.
Precision-machined points cover with durable construction. Made in the USA.
Durable radiator guard with mounting bracket for easy installation. Protects against rocks and road debris. Made in the USA.
Transparent cam cover that matches Assault series air cleaners and allows internal inspection. Made in the USA.
Transparent cover for viewing internal engine components. Matches the Assault series air cleaners. Made in the USA.
Transparent cover for viewing internal engine components; matches Assault series air cleaners. Made in the USA.
Slim cam cover with a cut-away corner for improved floorboard clearance. Hardware included. Made in the USA.
Complete mounting kit with all required hardware for inner primary installation. Made in the USA.
Plug and plug kits for various Harley‑Davidson oil systems; includes washers or O‑rings as required. Made in the U.S.A.
Heat-treated, plated adjuster bolts with included chrome lock nuts. Made in the USA.
Durable button-head Allen drain screws with copper compression washers for fork sliders.
Stem bolt with washer; complete hardware kit, made in the U.S.A.
Complete mounting kit for rotors, sprockets and belt drives; includes all required hardware for installation.
Three screws to mount S&S air cleaner covers. Made in the U.S.A.