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.
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.
Quick installation, clean classic look, durable finish, secures the factory component in place.
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.
Directs air through a side scoop to cool cylinder heads; includes a high-powered waterproof fan, temperature switch (activates at 140°F), manual override, wiring and hardware. Plug-and-play installation with no drilling. Not for "Twin Cooled" models.
State-of-the-art compression release valves that reduce hot starts and lower starter and battery loads. Sold as a set and made in the U.S.A.
State-of-the-art design to reduce hot starts and starter/battery loads. Custom molded knobs, sold in pairs, made in the U.S.A.
Quality pinion shaft bushing manufactured in the U.S.A. Precision fit for reliable performance.