S&S Mr103 Cam Kit For Harley Twin Cam S&S Cycle was built around proven performance and has been known to push your bikes to their full potential. Once you've already added a stage one kit to your bike and looking squeeze out some more power a stage 2 upgrade is the way to go. Features All chain drive cams include installation kit Intake open/close: 13/33 Intake lift: 0,585 Intake duration: 226 Exhaust open/close: 50/22 Exhaust lift: 0,585 Exhaust duration: 252 Made in the USA