Very wide power range and excellent mid-range torque for LS engines with cathedral port cylinder heads. 2,000-7,000 RPM Operating Range 231/239 Duration at .050". 113 Degree Lobe Separation Angle 0.617/0.624 Valve Lift Cathedral Port Grinds - The LSR Cathedral Port camshaft series was designed specifically for the flow characteristics of LS1/LS2/LS6 design heads. Whether you have a 4.8L or 400+ C.I. LS, this series has grinds for any LS build. Fit type: Vehicle Specific