S&S Cycle 2006 BT Dyna 583G Gear Drive Camshaft KitS&S 583G Gear Drive camshaft kit with new . 583 inch lift cam is designed for engines with 96 to 106 CID and 9: 1 to 10: 1 compression this is a bolt in cam set designed for stock or mildly modified touring bikes. Greatly improves low end and midrange torque, strongest from idle 4000 rpm. Gear Drive cams improves valve timing accuracy by eliminating timing chain lash and there is no tensioner shoes to wear out or fail.