136" Cylinder Kit - 4.625" Stroke - Wrinkle Black w/o Highlighted Fins - M8 Original engine serial numbers are retained, MLS (Multi-Layered Steel) head gaskets, Retains stock engine height, Stock bolt pattern, Works with stock crankcase., Not compatible with VVT models.
The S&S Cycle 136" Big Bore Cylinder Kit is the largest bolt-on upgrade available for Milwaukee-Eight engines without machining your stock crankcases. This wrinkle black version with non-highlighted fins gives your motor a stealthy, factory-style look while delivering massive performance gains.
Kit includes: Two 4.320" cylinders, forged pistons, MLS head gaskets, base gaskets, and all necessary hardware. Retains stock engine height and original engine serial numbers.
Important: Requires a separate S&S 4-5/8" stroker flywheel (sold separately in this website section ). Not compatible with Variable Valve Timing (VVT) models or the stock Harley 4-5/8" flywheel.
Fitment: 2017-2026 Harley-Davidson Milwaukee-Eight Touring models (Road Glide, Street Glide, Road King, Electra Glide, etc.) and 2018-2026 Softail models. Confirm your bike is non-VVT before ordering.
