S&S Cycle 2017+ M8 Models 4.5in Stroke 132in Big Bore Kit

The biggest Big Bore possible with a slip in kit! The S&S 4.320" bore cylinder kit takes your 107" M8 to 129" and the 114" to 132"

• Works with stock crankcases (no machine work)
• Huge bore increase means huge power increase
• Powder coat finish matches factory finish
• MLS (multi-layered steel) head gaskets
• Includes Cubic Inch Cam Cover Badge
• Retains stock engine height
• 4.320" Bore
• Made in USA