S&S Cycle 99-06 Easy Start 551CE Chain Drive Camshaft Kit

If you're looking to get more low-end and midrange torque out of your 1999-2006 Harley-Davidson touring bike, this S&S Cycle 551CE chain drive camshaft kit is a solid option. Designed for engines ranging from 96 to 106 cubic inches with a compression ratio between 9:1 and 9.9:1, these cams are a direct bolt-in for stock or mildly modified setups. They're particularly effective at improving power from idle up to around 4000 RPM, making a noticeable difference in everyday riding and acceleration.

What sets these cams apart is the Easy Start feature, which allows your stock starter to handle the increased compression without issue, simplifying installation and operation. For 2005 and 2006 models, you can often use the stock valve springs, but for 1999-2004 models, you'll need to upgrade to special high-lift valve springs to accommodate the cam's lift. S&S adjustable pushrods are also recommended due to the higher lift profile, ensuring proper valve train geometry. To really unlock the potential of these cams, consider pairing them with a high-flow intake and exhaust system.

This kit comes with the camshafts themselves, a gear cover gasket, cam bearings, and installation instructions, providing a good foundation for your engine build. While these cams are designed to work with stock heads or S&S Super Stock heads, they can also take advantage of the extra flow from ported stock heads.