Includes Forceflow assembly with high-powered fan, OEM-type replacement horn, temperature switch, manual override switch, wiring, hardware and complete instructionsEasy plug-and-play installation with no drillingAt higher speeds, air is directed in through side scoop and around cylinder head and cylinderIncluded temperature switch automatically turns the Forceflow on at 140°FHigh-tech, waterproof cooling fan pushes air around cylinders and cylinder headsMade in the USANot for ''Twin Cooled'' models with liquid cooled heads.