132" Big-Bore Kit 4.5" Stroke Non-Highlighted Cylinders for 2017-up M8 ModelsThe 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". 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 4. 320" Bore Retains stock engine height Includes Cubic Inch Cam Cover Badge
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