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.
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.
Mounts S&S E/G or Keihin CV style air cleaners to Mikuni HSR 42/45 carburetors. Made in the USA.
Compact crankcase vent filter for reliable ventilation and easy installation.
Adapters fit spigot-type carburetors. Includes clamp. Made in Japan.
Replacement flange for spigot-type carburetors. Includes clamp for easy, secure installation.
Transparent cam cover designed to match Assault series air cleaners. Made in the USA.
- Versatile gasket kit for multiple engine applications
- Higher performance on imperfect surfaces
- Includes parts for head, base, covers and housings
For spigot-type carburetors. Original straight-through design. Includes clamp. Made in Japan.