

New genuine S&S 129 big bore kit for Harley Davidson Milwaukee 8 motors. S&S is extremely well known for their performance and quality in parts for Harley Davidson. 967 Custom Cycles is an authorized dealer for Mid-USA and I can be found on their dealer locator as well as Facebook. Tha largest Big Bore possible with a slip in kit. This S&S® clylinder and piston kit takes your 107" M8 to 129".
Black Cylinders with highlighted fins. Huge bore increase means huge power increase. Works with stock crankcases (no machine work). Powder coat finish matches factory finish. MLS (multi-layered steel) head gaskets. Includes Cubic Inch Cam Cover Badge.