S&S Cycle SS106-5247 585GE Gear Drive Easy Start Camshaft Kit for Twin Cam 99-06Description for S&S Cycle 585 Gear Drive Easy Start Cams Complete Kit Start any engine regardless of displacement or compression ratio with a stock starter The new Easy Start Cams from S&S Cyclemake hard starting obsolete Heres how it works: Each of the two exhaust cam lobes are equipped with a spring loaded compression release lobe on the "heal" of the cam at the point where the valve would normally be fully closed, the lobe holds the exhaust valve