Built for big-bore performance, this bolt-in power package increases compatible 114"/117" engines with a 4.5" stroke M8 to 132" with no case machining required.
It features updated profile components, 4.32" bore cylinders with 11.0:1 forged pistons, S&S oil pump/cam plate, Quickee pushrods, premium tappets, and S&S 550 cams designed for big bore applications.
Oil system details include independent scavenge sections for the flywheel cavity and cam chest, debris screens in both scavenge pickups, a magnet in the cam chest, increased oil flow capacity, and an adjustable pressure relief valve.
Also includes S&S hard-anodized, black coated tappet cuffs with billet aluminum construction, S&S valve springs for cams up to 0.605" lift, and a high-performance conical single wire spring design.
Compatible with VVT models. Not for Trike models. Intake and rocker cover gaskets are not included. Made in the USA.
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 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 | Softail Fat Boy 117 | Softail | 2026 | |
| Harley Davidson | Electra Glide Revival 114 | Touring | 2021 | |
| Harley Davidson | Softail Heritage Classic Anniversary 114 | Softail | 2018 | |
| 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 | Softail Heritage Classic 117 | Softail | 2026 | |
| Harley Davidson | Road King Special 114 | Touring | 2020 | |
| Harley Davidson | Road King Special 114 | Touring | 2022 | |
| Harley Davidson | Road King Special 114 | Touring | 2023 | |
| Harley Davidson | Road King Special 114 | Touring | 2024 | |
| Harley Davidson | Road King Special 114 | Touring | 2025 | |
| Harley Davidson | Street Glide 117 | Touring | 2024 | |
| Harley Davidson | Street Glide 117 | Touring | 2025 | |
| Harley Davidson | Street Glide 117 | Touring | 2026 | |
| Harley Davidson | Street Glide Special 114 | Touring | 2020 | |
| Harley Davidson | Street Glide Special 114 | Touring | 2021 | |
| Harley Davidson | Street Glide Special Anniversary 114 | Touring | 2023 | |
| Harley Davidson | Street Glide ST 117 | Touring | 2022 | |
| Harley Davidson | Street Glide ST 117 | Touring | 2023 | |
| Harley Davidson | Hydra-Glide Revival 114 | Softail | 2024 | |
| 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 Fat Boy Gray Ghost 117 | Softail | 2025 | |
| Harley Davidson | Softail Fat Boy Gray Ghost 117 | Softail | 2026 | |
| 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 3 117 | Trike | 2026 | |
| Harley Davidson | Road Glide 117 | Touring | 2024 | |
| Harley Davidson | Road Glide 117 | Touring | 2025 | |
| Harley Davidson | Road Glide 117 | Touring | 2026 | |
| Harley Davidson | Road Glide Special 114 | Touring | 2021 | |
| Harley Davidson | Road Glide Special Anniversary 114 | Touring | 2023 | |
| Harley Davidson | Road Glide ST 117 | Touring | 2022 | |
| Harley Davidson | Road Glide ST 117 | Touring | 2023 | |
| Harley Davidson | Softail Street Bob 117 | Softail | 2025 | |
| Harley Davidson | Softail Street Bob Solo 117 | Softail | 2026 | |
| 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 117 | Softail | 2023 | |
| Harley Davidson | Softail Breakout 117 | Softail | 2024 | |
| Harley Davidson | Softail Breakout 117 | Softail | 2025 | |
| Harley Davidson | Softail Breakout 117 | Softail | 2026 | |
| Harley Davidson | Softail Breakout Anniversary (ANX) 114 | Softail | 2018 | |
| Harley Davidson | Softail Breakout 114 | Softail | 2019 | |
| 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 114 | Softail | 2018 | |
| Harley Davidson | Softail Fat Bob 114 | Softail | 2019 | |
| 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 S 114 | 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 S 117 H.O. | Softail | 2026 | |
| Harley Davidson | Softail Low Rider ST 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 Low Rider ST 117 H.O. | Softail | 2026 |