S&S Cycle 129" Power Package Engine Performance Kit 550 Gear Drive for '17-26 Harley Davidson Oil Cooled Touring and '18-26 Softail - Wrinkle Black w/Highlighted Fins/ Chrome Pushrod Tubes
- Big-bore bolt-on kit increases 107" M8 to 129" with no case machining required
- 4.32" bore cylinders with 11.0:1 compression ratio 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
- S&S premium tappets
- S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
- S&S 550 cams are designed for big bore applications
- S&S valve springs work with cams up to 0.605" lift
- High-performance conical single wire spring design
- Made in the USA
Notes
- Will fit VVT models.
- Not for any Trike models.
- Intake/rocker cover gaskets not included.
DISCLAIMER: Not legal for sale or use in California on any pollution controlled motor vehicles.
Fitments
| 2026 | Harley-Davidson | FXBR Breakout 117 |
| 2025-2026 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2025-2026 | Harley-Davidson | Softail Fat Boy FLFB |
| 2025 | Harley-Davidson | Street Glide EFI FLHX |
| 2025 | Harley-Davidson | Softail Breakout FXBR |
| 2020-2024 | Harley-Davidson | FXST Softail Standard 107 |
| 2018-2021 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2018-2021 | Harley-Davidson | FLSL Softail Slim 107 |
| 2018-2021 | Harley-Davidson | FLSB Sport Glide 107 |
| 2018-2020 | Harley-Davidson | FLFB Fat Boy 107 |
| 2018-2020 | Harley-Davidson | FLDE Deluxe 107 |
| 2018-2020 | Harley-Davidson | FXBB Street Bob 107 |
| 2018-2020 | Harley-Davidson | FXLR Low Rider 107 |
| 2018-2019 | Harley-Davidson | FXBR Breakout 107 |
| 2018-2019 | Harley-Davidson | FXFB Fat Bob 107 |
| 2017-2026 | Harley-Davidson | FLHX Street Glide |
| 2017-2026 | Harley-Davidson | FLTRX Road Glide |
| 2017-2023 | Harley-Davidson | FLTRXS Road Glide Special |
| 2017-2023 | Harley-Davidson | FLHXS Street Glide Special |
| 2017-2022 | Harley-Davidson | FLHR Road King |
| 2017-2019 | Harley-Davidson | FLHRC Road King Classic |
























