S&S Cycle 99-06 BT 635G Gear Drive Camshaft Kit

This S&S Cycle 635G Gear Drive Camshaft Kit includes the camshaft itself, designed to fit 1999 through 2006 Harley-Davidson Big Twin models, excluding the 2006 Dyna. This kit is a solid choice for riders looking to get more out of their modified engines, especially those with larger displacement and higher compression. It's built to deliver more torque and horsepower than typical bolt-in cams can achieve, making a notable difference in how your bike performs.

The 635G camshaft features specific timing events and durations, with intake opening at 19.5º and closing at 43.5º, and exhaust opening at 58.5º and closing at 37.5º. At 0.053 inches lift, the duration is 243º for the intake and 276º for the exhaust. The valve lift is a substantial 0.635 inches on both intake and exhaust. These specifications indicate a camshaft designed for significant performance gains. For optimal results and to handle the increased lift, you'll need to use high-lift springs in all applications. While this kit focuses on the camshaft, S&S Cycle also highly recommends upgrading to an S&S oil pump and cam support plate, along with a 2007 and later style hydraulic cam chain tensioner, especially if your current setup is chain-driven.

To truly unlock the potential of this camshaft, pairing it with performance intake and exhaust systems is recommended. This kit is not CARB approved and cannot be shipped to California. It's a significant upgrade for those serious about enhancing their Big Twin's power output.