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.
Includes mounting screws. Easy bolt-on installation. Made in the USA.
- Protects internal timing components
- Includes mounting screws for installation
- Available in plated or anodized finishes
- Made in the USA
- Includes mounting screws
- Chrome-plated or anodized billet aluminum finish
- Made in the USA
Precision-milled timing cover. Includes mounting screws. Chrome-plated or anodized billet aluminum finish. 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 oil cooler kit with AN #6 fittings, supplied clamps and reducers, and precision-machined components for durable, easy installation.
Reduces oil temperatures using engine temperature and vehicle speed. Quick 15-minute install; no oil cooler removal. Plug-n-play on M8 models with compatible ECM. Made in the USA.
Transparent cam cover designed to match Assault series air cleaners. Made in the USA.
Complete oil cooler kit with AN #6 fittings and frame-mount clamps.
CNC-machined billet aluminum construction for precise fit.
Easy-install head bolt covers; includes Schrader valve cap. Sold as a set of four.
Custom aluminum cover with ball-milled finish. Sold individually.
Polished chrome billet inspection cover in ball-end milled or smooth style; includes chrome hardware. Sold each.
Billet-style inspection cover with included mounting hardware. Sold individually.