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.
OEM-quality piston kit includes two pistons, wrist pins and clips. Economical replacement with proven performance.
Big Bore piston for Twin Cam engines — precision-machined for dependable performance and straightforward installation.
Durable, OEM-compliant replacement that ships fitted and ready to install; complete kit with crankpin, retainers, bearings and nuts.
Forged performance replacement for stock hydraulic roller lifters. 100% tested and made in the U.S.A.
High-quality cast aluminum oil pump assembly with steel gears; gaskets and seals included.
Increases feed and scavenge capacity for M8 fourth generation engines; fits air-cooled models only.
Vibration-damping mount engineered to meet or exceed OEM specifications.
Reduces engine movement and vibration; includes mounting hardware.