High lift and longer duration cam builds power sooner in the RPM range and holds it for longer. The S&S cam for the 650 Twin uses the stock adjustable timing sprocket to allow you to dial in the power curve to match your riding style. Intake opens 1° BTDC, closes 35° ABDC, has a 216° duration and a 107° lobe center. Exhaust opens 32° BBDC, closes 10° ATDC, has a 222° duration and a 101° lobe center.