129" Big-Bore Kit 4.375" Stroke Highlighted Cylinders for 2017-up M8 Models Engine Guards Bad Dad's Long Strokes Exhaust

Bad Dad's Long Strokes Exhaust Pipes are the perfect pipe to complement your new Stretched Saddlebags

We stock sizes to fit 18"

Machined for installation of a crank position sensor

paint them

129" Big-Bore Kit 4.375" Stroke Highlighted Cylinders for 2017-up M8 Models Engine Guards Bad Dad's Long Strokes ExhaustThe biggest Big Bore possible with a slip in kit! These S&S cylinder and piston kits 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