S&S 129" Big Bore Kit
- Huge bore increase to 4.320" means huge power gains for your Milwaukee Eight 107 cubic inch engine
- Retains stock engine height
- Powder coat finish match factory finish, giving the bike a sleeper advantage
- Works with stock crankcases
- MLS (multi-layered steel) head gaskets
- Original engine serial numbers are retained
- Includes cam cover badge
- Made in the USA
Product Note:
Specification | Details |
---|---|
Bore | 4.32 in. |
Color | Varies (make selection above) |
Country of Origin | USA |
Displacement | 129CI |
Engine Type | Milwaukee Eight 107 |
Finish | Powder Coated |
Stroke | 4.375 in. |
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Harley Davidson
Harley Davidson
- FLDE Softail Deluxe 2018-2020
- FLFB Softail Fat Boy 2018-2019
- FLHC Softail Heritage Classic 2018-2021
- FLHR Road King 2017-2022
- FLHRXS Road King Special 2017-2018
- FLHT Electra Glide Standard 2019-2022
- FLHTCU Electra Glide Ultra Classic 2017-2018
- FLHTCUTG Tri Glide Ultra Classic 2017-2018
- FLHTK Electra Glide Ultra Limited 2017-2018
- FLHTKL Electra Glide Ultra Limited Low 2017-2018
- FLHX Street Glide 2017-2023
- FLHXS Street Glide Special 2017-2018
- FLRT Freewheeler 2017-2021
- FLSB Softail Sport Glide 2018-2021
- FLSL Softail Slim 2018-2021
- FLTRU Road Glide Ultra 2017-2018
- FLTRX Road Glide 2017-2023
- FLTRXS Road Glide Special 2017-2018
- FXBB Softail Street Bob 2018-2020
- FXFB Softail Fat Bob 2018-2019
- FXLR Softail Low Rider 2018-2020
- FXST Softail Standard 2020-2024
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