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Español![128\" Power Package — Bore 4.250\", Stroke 4.500\", 11.1:1 compression](https://www.jackyethunder.com/235691-large_default/ss-cycle-powerpak-watercool-425bore-4.jpg "128\\" Power Package — Bore 4.250\\", Stroke 4.500\\", 11.1:1 compression")
![128\" Power Package — Bore 4.250\", Stroke 4.500\", 11.1:1 compression](https://www.jackyethunder.com/235691-home_default/ss-cycle-powerpak-watercool-425bore-4.jpg "128\\" Power Package — Bore 4.250\\", Stroke 4.500\\", 11.1:1 compression")
![128\" Power Package — Bore 4.250\", Stroke 4.500\", 11.1:1 compression](https://www.jackyethunder.com/239370-home_default/ss-cycle-powerpak-watercool-425bore-4.jpg "128\\" Power Package — Bore 4.250\\", Stroke 4.500\\", 11.1:1 compression")
![128\" Power Package — Bore 4.250\", Stroke 4.500\", 11.1:1 compression](https://www.jackyethunder.com/242235-home_default/ss-cycle-powerpak-watercool-425bore-4.jpg "128\\" Power Package — Bore 4.250\\", Stroke 4.500\\", 11.1:1 compression")
![128\" Power Package — Bore 4.250\", Stroke 4.500\", 11.1:1 compression](https://www.jackyethunder.com/245677-home_default/ss-cycle-powerpak-watercool-425bore-4.jpg "128\\" Power Package — Bore 4.250\\", Stroke 4.500\\", 11.1:1 compression")
Free EU shipping for orders over 150€
Bolt-in big bore kit that expands compatible engines up to 128" without case machining.
Forged pistons and a complete hardware set are included, featuring an oil pump/cam plate, pushrods with chrome covers, tappets and tappet cuffs, S&S 550 camshaft, and valve springs.
Easy to install and built for durability, this package is not for 121" CVO models.
Upgrade your engine's performance with confidence. 🔧🔥
: 0904-0142
In Stock
Data sheet
- Units
- Kit
- Color/Finish
- Black, Highlighted Fins
- Brand
- S&S CYCLE
- Bore Size
- 4,250"
- Displacement
- 128"
- Cooling System
- Water Cooled
- Stroke Length
- 4,500"
- Compression Ratio
- 11.1:1
- Cam Drive Type
- Chain
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Electra Glide Highway King 114 | Touring | 2023 | |
| Harley Davidson | Trike Tri Glide Ultra Classic 107 | Trike | 2017 | |
| Harley Davidson | Tri Glide Ultra 107 | Trike | 2018 | |
| Harley Davidson | Tri Glide Ultra 107 | Trike | 2019 | |
| 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 | Electra Glide Ultra Limited 107 | Touring | 2017 | |
| Harley Davidson | Ultra Limited Shrine Edition 107 | Touring | 2018 | |
| Harley Davidson | Ultra Limited Shrine Edition 114 | Touring | 2019 | |
| Harley Davidson | Ultra Limited Shrine Edition 114 | Touring | 2020 | |
| Harley Davidson | Ultra Limited Shrine Edition 114 | Touring | 2021 | |
| Harley Davidson | Ultra Limited Shrine Edition 114 | Touring | 2022 | |
| Harley Davidson | Ultra Limited Shrine Edition 114 | Touring | 2023 | |
| Harley Davidson | Glide Ultra Limited 114 | Touring | 2024 | |
| Harley Davidson | Electra Glide Ultra Limited Low 107 | Touring | 2017 | |
| Harley Davidson | Ultra Limited Low 107 | Touring | 2018 | |
| Harley Davidson | Ultra Limited Low 114 | Touring | 2019 | |
| Harley Davidson | Electra Glide Ultra Limited CVO 114 | CVO | 2017 | |
| Harley Davidson | Ultra Limited CVO 117 | CVO | 2019 | |
| Harley Davidson | Ultra Limited CVO 117 | CVO | 2020 | |
| Harley Davidson | Ultra Limited CVO 117 | CVO | 2021 | |
| Harley Davidson | Ultra Limited CVO Anniversary 117 | Touring | 2018 | |
| Harley Davidson | Street Glide CVO 114 | CVO | 2017 | |
| Harley Davidson | Street Glide CVO 117 | CVO | 2018 | |
| Harley Davidson | Street Glide CVO 117 | CVO | 2020 | |
| Harley Davidson | Street Glide CVO 117 | CVO | 2021 | |
| Harley Davidson | Road Glide Limited 114 | Touring | 2020 | |
| Harley Davidson | Road Glide Limited 114 | Touring | 2021 | |
| Harley Davidson | Road Glide Limited 114 | Touring | 2022 | |
| Harley Davidson | Road Glide Limited 114 | Touring | 2023 | |
| Harley Davidson | Road Glide Limited 114 | Touring | 2024 | |
| Harley Davidson | Road Glide Limited CVO 117 | CVO | 2022 | |
| Harley Davidson | Road Glide Limited Anniversary CVO 117 | CVO | 2023 | |
| Harley Davidson | Road Glide Ultra 107 | Touring | 2017 | |
| Harley Davidson | Road Glide Ultra 107 | Touring | 2018 | |
| Harley Davidson | Road Glide Ultra 114 | Touring | 2019 | |
| Harley Davidson | Road Glide CVO 117 | CVO | 2018 | |
| Harley Davidson | Road Glide CVO 117 | CVO | 2020 | |
| Harley Davidson | Road Glide CVO 117 | CVO | 2021 | |
| Harley Davidson | Road Glide CVO 117 | CVO | 2022 |