S&S 635 H.o. Easy Start Cam Kit For Harley Twin Cam Features: Look no further if you'd like to improve your late model 2007-2014 V-Twin camshaft Easy start cams allow stock starter to start any engine No tensioner shoes to wear out or fail Designed for big inch engines with intake and exhaust modifications 635 H.o. Cam Info: High power cam for modified engines: increased compression, high-lift valve springs and large bore throttle body required For best results, ported heads and low-restriction intake/exhaust are also required 4000 Rpm-6500 RPM Intake open/close 19.5/43.5 Exhaust open/close 58.5/37.5 Intake duration 243 Exhaust duration 276 Lift .635