For dual cam engineAdds a 5%-10% power gainDesigned and dyno proven in the USAManufactured by utilizing state of the art valvetrain softwareCNC machined from 8620 billet, case-hardened steel for an exact fit and lobe profileThis exhaust camshaft is to be used with specified stage 1 and stage 2 intake camshafts as noted.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.