The S&S® 131 Big Bore Kits for M8 offer a huge displacement increase which in turn produces a huge power increase. Works with stock crankcases and retains stock engine height. Includes 131 cam cover badge and original engine serial numbers remain intact.
- .045 MLS (multi-layered steel) head gaskets
- Powder coat finish matches factory finish
- Made in USA
- Fits Milwaukee-Eight 17-20
Note: Must be used with 4 5/8 stroker flywheel to achieve 131 displacement. P/N 503293, sold separately.