High-performance racing camshafts In most applications, Stage 1 cams deliver more torque and Stage 2 cams provide more peak horsepower 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 New Builder Series camshafts offer engine builders a multitude of options for different engine configurations