590G Gear Drive Camshaft Kit for 2017-Up M8 ModelsThe 590G cam was designed as an all out Horsepower Cam for 124 and larger engines. Big lift lets your big mill breathe high into the RPM range! FEATURES & BENEFITS S&S 590 Cam Designed for massive horsepower in 124 and larger engines 590 cam powerband is weighted to top end performance, peaking past the redline of a stock motor. Gear Drive Kits provide improved cam timing accuracy and eliminate the stock cam chain tensioner Gear Drive kits include