Description
S&S Cycle - 310-1108A - 128" Power Package Engine Performance Kit - Gear Drive
Features
- Big-bore bolt-on kit increases 114"/117" with 4-1/2" stroke M-Eight with no case machining required
- 4-1/4" bore cylinders with 11:1 forged pistons
- S&S oil pump/cam plate with blue anodized finish
- Passage plugs are removable for servicing
- Independent scavenge sections for flywheel cavity and cam chest
- Debris screen in both scavenge pickups
- Magnet in cam chest to help prevent debris from entering the oil pump
- Increased oil flow capacity on both the oil feed and scavenge side
- Adjustable pressure relief valve can be adjusted with the unit installed in the engine
- Quickee pushrods with chrome pushrod tubes
- S&S premium tappets
- S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
- Improve tappet stability in high-lift, high-rpm situations
- S&S 550 cams designed for big bore applications
- S&S valve springs work with cams up to .605" lift
- High-performance conical single-wire spring design
- All necessary gaskets, bearings, and hardware for bolt-on installation is included
- Made in the U.S.A.
Specs
| Color/Finish | Highlighted Fins |
| Cooling System | Water Cooled |
| Color/Finish | Black Granite |
| Displacement | 128'' |
| Units | Kit |
| Compression Ratio Imperial | 11.1:1 |
| Bore Size Imperial | 4.250'' |
| Cam Drive Type | Gear |
| Stroke Length Imperial | 4.50'' |
| Style | Big Bore |
| Model | Power Package |
| Riding Style | Street |
| Type | Engine |
| Cooling System | Oil Cooled |
| Product Name | Performance Kit |
Fitment
| 2017-2021 | Harley-Davidson | CVO Electra Glide Ultra Limited FLHTKSE |
| 2018-2022 | Harley-Davidson | CVO Road Glide Custom FLTRXSE |
| 2022 | Harley-Davidson | CVO Road Glide Limited |
| 2017-2022 | Harley-Davidson | CVO Street Glide FLHXSE |
| 2017-2021 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2021 | Harley-Davidson | Electra Glide Revival |
| 2019-2022 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Classic EFI FLHTCUI |
| 2017-2022 | Harley-Davidson | Electra Glide Ultra Limited FLHTK |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Limited Low FLHTKL |
| 2019-2020 | Harley-Davidson | FXDR 114 |
| 2017-2022 | Harley-Davidson | Road Glide Custom FLTRX |
| 2020-2022 | Harley-Davidson | Road Glide Limited FLTRK |
| 2017-2022 | Harley-Davidson | Road Glide Special FLTRXS |
| 2022 | Harley-Davidson | Road Glide ST FLTRXST |
| 2017-2019 | Harley-Davidson | Road Glide Ultra FLTRU |
| 2017-2022 | Harley-Davidson | Road King EFI FLHR |
| 2017-2022 | Harley-Davidson | Road King Special FLHRXS |
| 2018-2020 | Harley-Davidson | Softail Breakout 114 FXBRS |
| 2018-2019 | Harley-Davidson | Softail Breakout FXBR |
| 2018-2020 | Harley-Davidson | Softail Deluxe FLDE |
| 2018-2022 | Harley-Davidson | Softail Fat Bob 114 FXFBS |
| 2018-2019 | Harley-Davidson | Softail Fat Bob FXFB |
| 2018-2022 | Harley-Davidson | Softail Fat Boy 114 FLFBS |
| 2018-2019 | Harley-Davidson | Softail Fat Boy FLFB |
| 2018-2022 | Harley-Davidson | Softail Heritage Classic 114 FLHCS |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2018-2020 | Harley-Davidson | Softail Low Rider FXLR |
| 2020-2022 | Harley-Davidson | Softail Low Rider S FXLRS |
| 2022 | Harley-Davidson | Softail Low Rider ST FXLRST |
| 2018-2021 | Harley-Davidson | Softail Slim FLSL |
| 2018-2021 | Harley-Davidson | Softail Sport Glide FLSB |
| 2020-2022 | Harley-Davidson | Softail Standard FXST |
| 2018-2022 | Harley-Davidson | Softail Street Bob FXBB |
| 2017-2022 | Harley-Davidson | Street Glide EFI FLHX |
| 2017-2022 | Harley-Davidson | Street Glide Special FLHXS |
| 2022 | Harley-Davidson | Street Glide ST FLHXST |
