760439 Include S S Easy Start Camshafts and Work with Stock or Afte

Transform your Softail's performance with the S&S 124CI Hot Set Up Kit, designed to convert your stock Twin Cam A or B engine into a high-displacement powerhouse while retaining your original crankcases and serial numbers. This comprehensive kit includes 4 1/8-inch bore cylinders, matching pistons, and a 4 5/8-inch stroke flywheel assembly. To ensure smooth operation and easy starting, S&S includes their 91cc cylinder heads and Easy Start 640 gear drive cams, resulting in a potent 10.8:1 compression ratio. These kits fit 1999 to 2002 Twin Cam models directly, while 2003 to 2017 models require a Timken bearing conversion sleeve. Whether you're running a carburetor or fuel injection, this kit provides the mechanical foundation for massive torque and horsepower gains. It’s an ideal solution for the rider who wants the performance of a crate engine while keeping their bike's original identity intact.