S&amp,S Cycle 583 Gear Drive Easy Start Cams Complete Kit 106-5811 Convert your Twin Cam to a gear drive Kit included cams, all gears, gaskets, bearings, botls and bearing plate Optimized for use as a great overall cam in the Softail/Dyna lines, but can be used in any 1999-2012 Big Twin models. Provides strong low end torque and horsepower that you can really feel. Strongest from 1500-5000 rpm in a Softail/Dyna application.