Made in the USA, this bolt-on big bore kit is engineered to improve power and reliability with forged pistons and precision-machined billet aluminum components.
The package includes Quikee pushrods, S&S precision tappets with hard-anodized tappet cuffs, and high-performance valve springs matched to S&S cam profiles designed for big bore use.
Oil management features independent scavenge sections for the flywheel cavity and cam chest, debris screens in both scavenge pickups, a magnet in the cam chest to help stop debris, and removable passage plugs for servicing.
Design improvements such as increased feed and scavenge flow capacity and an adjustable pressure relief valve (adjustable with the unit installed) help maintain oiling under high-load conditions.
S&S does not recommend compression ratios higher than 10:1 for Tri Glide® or other three wheel models (including conversions) due to extra loads caused by the lugging nature of these bikes. Detonation and subsequent engine damage may result.
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 | 2018 | Gear Drive |
| Harley Davidson | Softail Deluxe 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Deluxe 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Softail Fat Boy 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Fat Boy 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Fat Boy 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2021 | |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2022 | |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Heritage Classic 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2021 | |
| Harley Davidson | Road King 107 | Touring | 2022 | |
| Harley Davidson | Road King 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Road King 107 | Touring | 2020 | Gear Drive |
| Harley Davidson | Road King Classic 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road King Classic 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Road King Classic 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Road King Special 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road King Special 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Electra Glide Standard 107 | Touring | 2021 | |
| Harley Davidson | Electra Glide Standard 107 | Touring | 2022 | |
| Harley Davidson | Electra Glide Standard 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Electra Glide Standard 107 | Touring | 2020 | Gear Drive |
| Harley Davidson | Electra Glide Ultra Classic 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Trike Tri Glide Ultra Classic 107 | Trike | 2017 | Gear Drive |
| Harley Davidson | Tri Glide Ultra Anniversary 107 | Trike | 2018 | Gear Drive |
| Harley Davidson | Tri Glide Ultra 107 | Trike | 2019 | Gear Drive |
| Harley Davidson | Street Glide 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Street Glide 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Street Glide 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Street Glide 107 | Touring | 2021 | |
| Harley Davidson | Street Glide 107 | Touring | 2022 | |
| Harley Davidson | Street Glide 107 | Touring | 2023 | |
| Harley Davidson | Street Glide 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Street Glide Anniversary 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Street Glide 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Street Glide 107 | Touring | 2020 | Gear Drive |
| Harley Davidson | Street Glide Special 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Street Glide Special 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Freewheeler 107 | Trike | 2017 | Gear Drive |
| Harley Davidson | Freewheeler 107 | Trike | 2018 | Gear Drive |
| Harley Davidson | Freewheeler 107 | Trike | 2019 | Gear Drive |
| 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 | 2018 | Gear Drive |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Sport Glide 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Softail Slim 107 | Softail | 2021 | |
| Harley Davidson | Softail Slim 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Slim 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Slim 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2021 | |
| Harley Davidson | Road Glide 107 | Touring | 2022 | |
| Harley Davidson | Road Glide 107 | Touring | 2023 | |
| Harley Davidson | Road Glide 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2019 | Gear Drive |
| Harley Davidson | Road Glide 107 | Touring | 2020 | Gear Drive |
| Harley Davidson | Road Glide Special 107 | Touring | 2017 | Gear Drive |
| Harley Davidson | Road Glide Special 107 | Touring | 2018 | Gear Drive |
| Harley Davidson | Softail Street Bob 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Street Bob 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Street Bob 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Softail Breakout 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Breakout 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Breakout 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Softail Fat Bob 107 | Softail | 2021 | |
| Harley Davidson | Softail Fat Bob 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Fat Bob 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Low Rider 107 | Softail | 2018 | Gear Drive |
| Harley Davidson | Softail Low Rider 107 | Softail | 2019 | Gear Drive |
| Harley Davidson | Softail Low Rider 107 | Softail | 2020 | Gear Drive |
| Harley Davidson | Softail Standard | Softail | 2021 | |
| Harley Davidson | Softail Standard | Softail | 2021 | |
| Harley Davidson | Softail Standard | Softail | 2022 | |
| Harley Davidson | Softail Standard | Softail | 2023 |