4.250" bore cylinder kit with updated stock bolt pattern, compatible with stock crankcases. Requires S&S stroker flywheel for 131" displacement.
Built for riders looking to upgrade displacement with a bolt-on setup, this S&S CYCLE Cylinder Kit features a 4.250" bore and an updated profile with the stock 4.840" bolt pattern.
It works with stock crankcases and includes a 131" cam cover badge. To achieve 131" displacement, an S&S stroker flywheel is required and sold separately.
Made in the USA. Not for CVO 121" models.
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Softail Deluxe 107 | Softail | 2019 | |
| Harley Davidson | Softail Deluxe 107 | Softail | 2020 | |
| Harley Davidson | Softail Fat Boy 107 | Softail | 2020 | |
| Harley Davidson | Softail Fat Boy Anniversary (ANX) 114 | Softail | 2018 | |
| Harley Davidson | Softail Fat Boy 114 | Softail | 2019 | |
| Harley Davidson | Softail Fat Boy 114 | Softail | 2020 | |
| Harley Davidson | Softail Fat Boy 114 | Softail | 2021 | |
| Harley Davidson | Softail Fat Boy 114 | Softail | 2022 | |
| Harley Davidson | Softail Fat Boy 114 | Softail | 2023 | |
| Harley Davidson | Softail Fat Boy 114 | Softail | 2024 | |
| Harley Davidson | Softail Fat Boy 117 | Softail | 2025 | |
| Harley Davidson | Electra Glide Revival 114 | Touring | 2021 | |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2019 | |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2020 | |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2021 | |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2022 | |
| Harley Davidson | Softail Heritage Classic 114 | Softail | 2019 | |
| Harley Davidson | Softail Heritage Classic 114 | Softail | 2020 | |
| Harley Davidson | Softail Heritage Classic 114 | Softail | 2021 | |
| Harley Davidson | Softail Heritage Classic 114 | Softail | 2022 | |
| Harley Davidson | Softail Heritage Classic 114 | Softail | 2023 | |
| Harley Davidson | Softail Heritage Classic 114 | Softail | 2024 | |
| Harley Davidson | Softail Heritage Classic 117 | Softail | 2025 | |
| Harley Davidson | Electra Glide Highway King 114 | Touring | 2023 | |
| Harley Davidson | Road King Special 114 | Touring | 2025 | |
| Harley Davidson | Tri Glide Ultra Anniversary 107 | Trike | 2018 | |
| Harley Davidson | Tri Glide Ultra 114 | Trike | 2020 | |
| Harley Davidson | Tri Glide Ultra 114 | Trike | 2021 | |
| Harley Davidson | Tri Glide Ultra 114 | Trike | 2022 | |
| Harley Davidson | Tri Glide Ultra 114 | Trike | 2023 | |
| Harley Davidson | Tri Glide Ultra 114 | Trike | 2024 | |
| Harley Davidson | Tri Glide Ultra 114 | Trike | 2025 | |
| Harley Davidson | Tri Glide Ultra CVO 117 | CVO | 2020 | |
| Harley Davidson | Tri Glide Ultra CVO 117 | CVO | 2021 | |
| Harley Davidson | Tri Glide CVO 117 | CVO | 2022 | |
| Harley Davidson | Street Glide 117 | Touring | 2024 | |
| Harley Davidson | Street Glide 117 | Touring | 2025 | |
| Harley Davidson | Hydra-Glide Revival 114 | Softail | 2024 | |
| Harley Davidson | Freewheeler 107 | Trike | 2017 | |
| Harley Davidson | Freewheeler 107 | Trike | 2018 | |
| Harley Davidson | Freewheeler 107 | Trike | 2019 | |
| Harley Davidson | Freewheeler 114 | Trike | 2020 | |
| Harley Davidson | Freewheeler 114 | Trike | 2021 | |
| Harley Davidson | Freewheeler 114 | Trike | 2022 | |
| Harley Davidson | Freewheeler 114 | Trike | 2023 | |
| Harley Davidson | Freewheeler 114 | Trike | 2024 | |
| Harley Davidson | Freewheeler 114 | Trike | 2025 | |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2019 | |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2020 | |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2021 | |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2022 | |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2023 | |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2024 | |
| Harley Davidson | Softail Slim 107 | Softail | 2018 | |
| Harley Davidson | Softail Fat Boy Gray Ghost 117 | Softail | 2025 | |
| Harley Davidson | Road Glide 3 114 | Trike | 2023 | |
| Harley Davidson | Road Glide 3 114 | Trike | 2024 | |
| Harley Davidson | Road Glide 3 114 | Trike | 2025 | |
| Harley Davidson | Road Glide 117 | Touring | 2024 | |
| Harley Davidson | Road Glide 117 | Touring | 2025 | |
| Harley Davidson | Softail Street Bob 117 | Softail | 2025 | |
| Harley Davidson | Softail Street Bob 114 | Softail | 2021 | |
| Harley Davidson | Softail Street Bob 114 | Softail | 2021 | |
| Harley Davidson | Softail Street Bob 114 | Softail | 2022 | |
| Harley Davidson | Softail Street Bob 114 | Softail | 2023 | |
| Harley Davidson | Softail Street Bob 114 | Softail | 2024 | |
| Harley Davidson | Softail Breakout 107 | Softail | 2019 | |
| Harley Davidson | Softail Breakout 107 | Softail | 2020 | |
| Harley Davidson | Softail Breakout 117 | Softail | 2023 | |
| Harley Davidson | Softail Breakout 117 | Softail | 2024 | |
| Harley Davidson | Softail Breakout 117 | Softail | 2025 | |
| Harley Davidson | Softail Breakout Anniversary (ANX) 114 | Softail | 2018 | |
| Harley Davidson | Softail Breakout 114 | Softail | 2020 | |
| Harley Davidson | Softail Breakout 114 | Softail | 2021 | |
| Harley Davidson | Softail Breakout 114 | Softail | 2022 | |
| Harley Davidson | Softail King 114 | Softail | 2019 | |
| Harley Davidson | Softail King 114 | Softail | 2020 | |
| Harley Davidson | Softail Fat Bob 107 | Softail | 2018 | |
| Harley Davidson | Softail Fat Bob 107 | Softail | 2021 | |
| Harley Davidson | Softail Fat Bob 114 | Softail | 2020 | |
| Harley Davidson | Softail Fat Bob 114 | Softail | 2021 | |
| Harley Davidson | Softail Fat Bob 114 | Softail | 2022 | |
| Harley Davidson | Softail Fat Bob 114 | Softail | 2023 | |
| Harley Davidson | Softail Low Rider 107 | Softail | 2020 | |
| Harley Davidson | Softail Low Rider S 114 | Softail | 2021 | |
| Harley Davidson | Softail Low Rider S 117 | Softail | 2022 | |
| Harley Davidson | Softail Low Rider S 117 | Softail | 2023 | |
| Harley Davidson | Softail Low Rider S 117 | Softail | 2024 | |
| Harley Davidson | Softail Low Rider S 117 H.O. | Softail | 2025 | |
| Harley Davidson | Softail Low Rider ST EL Diablo 117 | Softail | 2022 | |
| Harley Davidson | Softail Low Rider ST 117 | Softail | 2023 | |
| Harley Davidson | Softail Low Rider ST 117 | Softail | 2024 | |
| Harley Davidson | Softail Low Rider ST 117 H.O. | Softail | 2025 | |
| Harley Davidson | Softail Standard | Softail | 2021 | |
| Harley Davidson | Softail Standard | Softail | 2020 | |
| Harley Davidson | Softail Standard | Softail | 2021 | |
| Harley Davidson | Softail Standard | Softail | 2022 | |
| Harley Davidson | Softail Standard | Softail | 2023 | |
| Harley Davidson | Softail Standard | Softail | 2024 |
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