4044-1E - Hot Cams Camshaft Exhaust Stage 1 For Yamaha WRF450 2003-2015

Features: Stage 1 is designed for low end torque. Adds a 5%-10% power gain. Designed and dyno proven in the USA. Manufactured by utilizing state of the art valvetrain software. CNC machined from 8620 billet, case-hardened steel for an exact fit and lobe profile. Engineered to be drop-in cams, that use stock valve springs (unless otherwise noted).. Select cams feature Hot Cams Improved Throttle Design (ITR) technology; these cams improve throttle response throughout the entire rpm range while providing excellent power gains through the mid-range and top-end.. For dual cam engine.. Top end power increase with some bottom end loss. Includes auto-decompression mechanism. Exhaust Valve Lash: 0.200 mm..