Engine

Active filters
Reinforced, smooth-bore fuel- and oil-resistant line for reliable service.
- 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.
Complete two-piston kit with precision-fit rings and enhanced pin oiling for dependable sealing and long life.
Die-cast aluminum cam cover; bushings installed to OEM specs. Includes oil seal, mounting hardware and gasket.
Forged, precision-fit piston kit with ArmorGlide® skirt coating and force-fed pin oiling. Value-pack includes two pistons, rings, pins, and circlips.
Die-cast construction with a detailed eagle, banner and script; low-profile fit and easy installation.
Forged aluminum piston kit with ArmorGlide® skirt coating; includes two pistons, rings, piston pins and circlips for a complete install.
Die-cast aluminum points cover featuring a detailed eagle with banner and script. Easy to install and ideal for vintage styling.
Forged aluminum piston kit with ArmorGlide® skirt coating; includes two pistons, rings, piston pins and circlips.