Product Description
S&S 128" Power Package Big Bore Kit Oil-Cooled for 114"/117" Harley M8
S&S 128" Power Package Kit for Harley models. - Oil cooled
Fits: 2017-2026 Harley M8 Models with Oil-Cooled Engines (Except CVO 121")
- 114" to 128" big bore kit; 114" and 117" CVO to 128" big bore kit
- Bolt-in kit, case maching not required
- Forged pistons
- Includes oil pump/cam plate, pushrods with chrome covers, tappets, tappet cuffs, S&S 550 camshaft, and valve springs
NOTE: Not for 121" CVO Models
Fitment
| 2025 | Harley-Davidson | Road Glide 3 FLTRT | - | - |
| 2025 | Harley-Davidson | Road Glide Custom FLTRX | - | - |
| 2025 | Harley-Davidson | Freewheeler FLRT | - | - |
| 2025 | Harley-Davidson | Street Glide EFI FLHX | - | - |
| 2024-2025 | Harley-Davidson | Road Glide Police FLTRXP | - | - |
| 2024 | Harley-Davidson | FLI Hydra-Glide Revival | - | - |
| 2023-2025 | Harley-Davidson | FLTRT Road Glide 3 | - | - |
| 2023-2024 | Harley-Davidson | FXBR Breakout 117 | - | - |
| 2023 | Harley-Davidson | FLHFB Electra Glide Highway King | - | - |
| 2022-2024 | Harley-Davidson | FXLRS Low Rider S 117 | - | - |
| 2022-2024 | Harley-Davidson | FXLRST Low Rider ST 117 | - | - |
| 2022-2023 | Harley-Davidson | FLHXST Street Glide ST | - | - |
| 2022-2023 | Harley-Davidson | FLTRXST Road Glide ST | - | - |
| 2022 | Harley-Davidson | FXRST Low Rider El Diablo 117 | - | - |
| 2021-2024 | Harley-Davidson | FXBBS Street Bob 114 | - | - |
| 2020-2021 | Harley-Davidson | FXLRS Low Rider S 114 | - | - |
| 2019-2022 | Harley-Davidson | FLHT Electra Glide Standard | - | - |
| 2019-2020 | Harley-Davidson | FXDRS FXDR 114 | - | - |
| 2018-2024 | Harley-Davidson | FLFBS Fat Boy 114 | - | - |
| 2018-2024 | Harley-Davidson | FLHCS Heritage Classic 114 | - | - |
| 2018-2023 | Harley-Davidson | FXFBS Fat Bob 114 | - | - |
| 2018-2022 | Harley-Davidson | FLTRXSE CVO Road Glide | - | - |
| 2018-2020 | Harley-Davidson | FXBRS Breakout 114 | - | - |
| 2017-2025 | Harley-Davidson | FLHRXS Road King Special | - | - |
| 2017-2025 | Harley-Davidson | FLHX Street Glide | - | - |
| 2017-2025 | Harley-Davidson | FLRT Freewheeler | - | - |
| 2017-2025 | Harley-Davidson | Electra Glide Police FLHTPI | - | - |
| 2017-2025 | Harley-Davidson | Road King Police FLHP | - | - |
| 2017-2023 | Harley-Davidson | FLHXS Street Glide Special | - | - |
| 2017-2023 | Harley-Davidson | FLTRXS Road Glide Special | - | - |
| 2017-2022 | Harley-Davidson | FLHXSE CVO Street Glide | - | - |
Additional Information
| MPN | 310-1109C |
| MPN | 310-1103C |
| MPN | 310-1105C |
| MPN | 310-1110C |
| MPN | 310-1104C |
| MPN | 310-1106C |