S&S 910-0843 129" Big-Bore Kit 4.375" Stroke Highlighted HARLEY SOFTAIL & TOURING M8 17-23
The biggest Big Bore possible with a slip in kit! These S&S cylinder and piston kits takes your 107" M8 to 129" and the 114" to 132".
- 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
Harley-Davidson
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Electra Glide Standard - FLHT • 2019-2022
Electra Glide Ultra Classic - FLHTCU • 2017-2019
Electra Glide Ultra Limited - FLHTK • 2017-2023
Electra Glide Ultra Limited CVO/SE - FLHTKSE • 2017-2021
Electra Glide Ultra Limited Low - FLHTKL • 2017-2019
Heritage Softail Classic - FLSTC • 2017
Road Glide - FLTRX • 2017-2023
Road Glide CVO/SE - FLTRXSE • 2018-2022
Road Glide Limited - FLTRK • 2020-2023
Road Glide Limited CVO/SE - FLTRKSE • 2022-2023
Road Glide Special - FLTRXS • 2017-2023
Road Glide ST - FLTRXST • 2022
Road Glide Ultra - FLTRU • 2017-2019
Road King - FLHR • 2017-2022
Road King Police - FLHP • 2017-2020
Road King Special - FLHRXS • 2017-2023
Softail Breakout - FXBR • 2018-2019, 2023
Softail Breakout - FXSB • 2017
Softail Breakout 114 - FXBRS • 2018-2020
Softail Deluxe - FLDE • 2018-2020
Softail Deluxe - FLSTN • 2017
Softail Fat Bob - FXFB • 2018-2019
Softail Fat Bob 114 - FXFBS 2018-2023
Softail Fat Boy - FLFB 2018-2019
Softail Fat Boy - FLSTF 2017
Softail Fat Boy 114 - FLFBS 2018-2023
Softail Fat Boy S - FLSTFBS 2017
Softail FXDR 114 - FXDRS 2019-2020
Softail Heritage Classic - FLHC 2018-2021
Softail Heritage Classic 114 - FLHCS 2018-2023
Softail Low Rider - FXLR 2018-2020
Softail Low Rider El Diablo - FXRST 2022
Softail Low Rider S - FXLRS 2020-2023
Softail Low Rider ST - FXLRST 2022-2023
Softail Pro Street Breakout CVO/SE - FXSE 2017
Softail Slim - FLS 2017
Softail Slim - FLSL 2018-2021
Softail Slim S - FLSS 2017
Softail Sport Glide - FLSB 2018-2021
Softail Standard - FXST 2020-2023
Softail Street Bob - FXBB 2018-2020
Softail Street Bob - FXBBS 2021-2023
Street Glide - FLHX 2017-2023
Street Glide CVO/SE - FLHXSE 2017-2022
Street Glide Special - FLHXS 2017-2023
Street Glide ST - FLHXST 2022-2023
