Purchase this 65mm throttle body and bolt on 3-4 h.p. at the wheels! The body and linkage are completely CNC machined from 6061 billet aluminum to exacting tolerances. The shaft is machined from stress-proof steel for increased durability. The 65mm butterfly is machined from virgin brass which provides a precise fit and function. It also has larger than stock, sealed bearings for smooth action. Installation is a fast and simple 20-30 minutes.