Designed and dyno proven in the USAEngineered by using valvetrain softwareAdds a 5%-10% power gainCNC machined from 8620 billet, case hardened steel for an exact fit and lobe profileSelect 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-endDesigned for low end torque.Engineered to be drop in cams that use stock valve springs (unless otherwise noted).