Andrews Products Grinds Its Cams With the Help of a Computer With Cam Design Capabilities. This Superior Technology Gives the Utmost in Both Performance and Reliability. Only the Best Alloy Steel Billets and Heat-Treating Processes Are Utilized. Furthermore, the Power in Harleys Twin Cam Engine Can Be Made Even More Convincing When Superior Andrews Computer-Designed High-Performance Cams Are Installed.J CAMSFor Mild Street ApplicationsAdd More Power Throughout Rpm Range and Maintain a Smooth IdleBolt in With No Head WorkDesigned to Fit 1970-1977 Harley Davidson Shovelhead ModelsMade in the USASold IndividuallyINTAKEOpen (In Degrees): 21Close (In Degrees): 41Duration at .053 (In Degrees): 242Duration at .020 (In Degrees): 292Valve Lift: .405Lift at TDC: .154EXHAUSTOpen (In Degrees): 41Close (In Degrees): 21Duration at .053 (In Degrees): 242Duration at .020 (In Degrees): 292Valve Lift: .405Lift at TDC: .154NOTE: It Is the Installer's Responsibility to Check Coil Bind and All ClearancesNOTE: The Image Displayed Is Representative of Andrews Cams, but May Vary Depending on Your Specific Model.