S&S Cycle 131 Hot Set Up Kit For Harley The S&S Cycle 131 inch kit for 2017 and newer M8 engines offers an ideal solution for those seeking to enhance performance discreetly. This kit increases engine displacement to deliver substantial power gains at the rear wheel while maintaining a stock appearance. Installation is straightforward and requires no machine work, ensuring a seamless fit. Included with the kit are all necessary gaskets, and for those who prefer to showcase their upgrade, a new 131 inch badge for the cam cover is also provided. Features: Huge displacement increase means huge power increase Works with stock crankcases Original engine serial numbers are retained Powder coat finish matches factory finishes Retains stock engine height Includes 131 Cam Cover Badge Made in the USA