S&S CYCLE 128" Power Pack - 4.500" Stroke - Water Cooled - Black Granite w/Highlights - M8 - Harley-Davidson '17-'25 - 310-1107C
🚚 Estimated Delivery: 09 Jul - 16 Jul
Big Bore Kit:
- 114" to 128" Big Bore Kit for Stock Stroke Flywheel
- Black Granite Finish
- Highlighted Fins
- No case machining required
- 4.250" bore
- Forged Pistons
- 11.1:1 Compression Ratio
Oil Pump/Cam Plate:
- Precision Machined from Billet Aluminum
- Blue Anodized Finish
- Passage Plugs Removeable for servicing
- Independant Scavenge Sections for Flywheel Cavity and Cam Chest
- Debris Screens in both scavenge pickups
- Magnet in Cam Chest to help to stop debris from entering oil pump
- Increased Flow Capacity on both Feed and Scavenge side
- Adjustable Pressure Relief Valve is adjustable with unit installed in engine
Pushrods:
- Quickee Pushrods w/Chrome Pushrod Tubes
Tappets:
- S&S Precision Tappets
Tappet Cuffs:
- Hard Anodized Black Coating
- Billet Aluminum Construction
- Stronger than Stock Material eliminates Distortion
- Improve tappet stability in high lift and high rpm situations
Cam:
- S&S 550 Cam- Designed for Big Bore Applications
- Chain Drive
Valve Springs:
- Work well with cams up to .605 lift
- High Performance Conical Single Wire Spring
- Includes all gaskets, bearings, and hardware required for installation
- MADE IN USA
Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.
Notes: Not for 121" CVO models.
Fitment Guide
| 2025 | Harley-Davidson | FLHXU Street Glide Ultra | - | - |
| 2025 | Harley-Davidson | Tri Glide Ultra Classic FLHTCUTG | - | - |
| 2022-2023 | Harley-Davidson | FLTRKSE CVO Road Glide Limited | - | - |
| 2022 | Harley-Davidson | FLHTCUTG Tri Glide Ultra G.I. | - | - |
| 2020-2024 | Harley-Davidson | FLTRK Road Glide Limited | - | - |
| 2020-2022 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide | - | - |
| 2017-2025 | Harley-Davidson | FLHTCUTG Tri Glide Ultra | - | - |
| 2017-2024 | Harley-Davidson | FLHTK Ultra Limited | - | - |
| 2017-2021 | Harley-Davidson | FLHTKSE CVO Limited | - | - |
| 2017-2019 | Harley-Davidson | FLHTKL Ultra Limited Low | - | - |
Specs
| Product Name | Performance Kit |
| Model | Power Package |
| Color/Finish | Black Granite / Highlighted Fins |
| Features | Quickee Pushrods w/Chrome Covers / Cam Chain Tensioner |
| Stroke Length | 4.500" |
| Displacement | 128" |
| Bore Size | 4.250" |
| Compression Ratio | 11.1:1 |
| Cam Drive Type | Chain |
| Cooling System | Water Cooled |
| Units | Kit |
| Riding Style | Street |
Delivery Info
Please Note - Warehouse Locations For This Part -
S&S CYCLE 128" Power Pack - 4.500" Stroke - Water Cooled - Black Granite w/Highlights - M8 - Harley-Davidson '17-'25 - 310-1107C
Gold Coast Warehouse- If your parts are in stock at our Gold Coast warehouse at the time of order, they will be shipped within 24hrs.
Supplier Warehouse - 2-3 Week Delivery- If your parts are located at our Supplier Warehouse, Delivery ETA is approx 2-3 weeks, as the parts are likely coming from our USA supplier warehouse. We will notify you once we receive it in Gold Coast warehouse and its on its way to you.