129" Power Package Engine Performance Kits / '17-'23 107" M8 Oil Cooled Motors

No Shipping to CA Transform your '17-'23 Oil Cooled M-Eight from a 107” powerhouse to an astonishing 129” behemoth with the S&S Cycles 129” Power Packages. This big-bore bolt-on kit requires no case machining, making it an ideal upgrade for '17-Up Harley models seeking maximum performance without extensive modifications. Here’s why the 129” Power Package is the ultimate choice for performance enthusiasts: Key Features: Bolt-On Big Bore Kit: Increases your M-Eight’s displacement to 129” with a 4.32” bore and 11:1 forged pistons, enhancing power and torque significantly. S&S Oil Pump/Cam Plate: Comes with an S&S oil pump and cam plate, both finished in a stylish blue anodized color. These components ensure optimal oil flow and engine efficiency. Removable Passage Plugs: For easy servicing, featuring independent scavenge sections for the flywheel cavity and cam chest to maintain cleanliness and efficiency. Debris Prevention: Includes a debris screen in both sc