S&S 136" Big bore kit M8

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Combining a new design forged piston with their 4.320” cylinders to net a tire melting 136 cubic inches when paired with their 4.625” stroker crank. We build our big bore kits and cranks to much tighter tolerances and with higher quality materials than the factory parts. This new piston/cylinder kit will be a solid platform for massive power. Huge displacement increase (4.320" Bore) means a huge power increase Works with stock crankcases Original engine serial numbers are retained Powder coat finish matches factory finish MLS (multi-layered steel) head gaskets Retains stock engine height Includes 136" Cam Cover Badge Requires 4 5/8" Stroker Crank Fitment : '17+ Touring '18+ Softail models Notes: For a build of this level, you should defin