Hot Cams Camshaft - Single Cam - Stage 3 - Yamaha - 4091-3

Computer Numerical Control (CNC) from 8620 billet steel and case harden. Designed and dyno proven in the USA. Engineered by using valvetrain software. Adds a 5%-10% power gain. Designed for peak top end horsepower. Engineered to be drop in cams that use stock valve springs (unless otherwise noted).. Select cams feature Hot Cams Improved Throttle Design (I.T.R.) technology; these cams improve throttle response throughout the entire rpm range while providing excellent power gains through the mid-range and top-end..