Product Description
The biggest Big Bore slip on kit available, S&S 129" Big Bore Kit for the 107" M8 Harley models. Choose between Highlighted and Non-Highlighted cylinders.
Fits: 2017-2022 M-Eight 107" Harley Models
- Bolt-on kit, the largest cylinder bore possible without required machining of the crankcases
- 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
- Made in USA
Additional Information
| 129" Big Bore Kit - Highlighted Cylinders | 910-0843 |
| 129" Big Bore Kit - Non-Highlighted Cylinders | 910-0844 |