Description
- Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment
- Cermic crown coating protects the piston by reducing heat transfer
- Internal and external bracing maintains optimized strength-to-weight ratio for longevity
- 3D undercrown milling in non-critical areas reduces overall weight
- Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost
- Skirt coating reduces operating friction and wear throughout the life of piston
- Offset pin reduces piston rock and minimize engine operating noise
- Skirt notches for optimal clearance at the bottom dead center
- Kit Includes:
- • 2x Ultra Series Pistons
- • 2x Wrist Pins
- • 2x Ring Sets
- • 2x Wire Locks
| Model | Ultra Series |
| Piston Material | Forged 2618 Aluminum |
| Bore Size | 4.310″ |
| Bore – Oversize | +0,060″ |
| Bore Oversize | +0.060″ |
| Compression Ratio | 11.25:1 |
| Stroke Length | 4.500″ |
| Piston Head Shape | Dished |
| Units | Kit |
| 2024 | Harley-Davidson | Road Glide Police FLTRXP | – | – |
| 2024 | Harley-Davidson | CVO Road Glide ST FLTRXSTSE | – | – |
| 2024 | Harley-Davidson | Hydra-Glide Revival | – | – |
| 2023 | Harley-Davidson | Electra Glide Highway King FLHFB | – | – |
| 2022-2024 | Harley-Davidson | Softail Low Rider ST FXLRST | – | – |
| 2022-2023 | Harley-Davidson | Road Glide ST FLTRXST | – | – |
| 2022-2023 | Harley-Davidson | Street Glide ST FLHXST | – | – |
| 2022-2023 | Harley-Davidson | CVO Road Glide Limited | – | – |
| 2022 | Harley-Davidson | Softail Low Rider El Diablo FXRST | – | – |
| 2021 | Harley-Davidson | Electra Glide Revival | – | – |
| 2020-2024 | Harley-Davidson | Softail Standard FXST | – | – |
| 2020-2024 | Harley-Davidson | Softail Low Rider S FXLRS | – | – |
| 2020-2024 | Harley-Davidson | Road Glide Limited FLTRK | – | – |
| 2019-2022 | Harley-Davidson | Electra Glide Standard EFI FLHTI | – | – |
| 2019-2020 | Harley-Davidson | FXDR 114 | – | – |
| 2018-2024 | Harley-Davidson | CVO Road Glide Custom FLTRXSE | – | – |
| 2018-2024 | Harley-Davidson | Softail Heritage Classic 114 FLHCS | – | – |
| 2018-2024 | Harley-Davidson | Softail Street Bob FXBB | – | – |
| 2018-2024 | Harley-Davidson | Softail Fat Boy 114 FLFBS | – | – |
| 2018-2023 | Harley-Davidson | Softail Fat Bob 114 FXFBS | – | – |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC | – | – |
| 2018-2021 | Harley-Davidson | Softail Sport Glide FLSB | – | – |
| 2018-2021 | Harley-Davidson | Softail Slim FLSL | – | – |
| 2018-2020 | Harley-Davidson | Softail Breakout 114 FXBRS | – | – |
| 2018-2020 | Harley-Davidson | Softail Deluxe FLDE | – | – |
| 2018-2020 | Harley-Davidson | Softail Low Rider FXLR | – | – |
| 2018-2019, 2023-2024 | Harley-Davidson | Softail Breakout FXBR | – | – |
| 2018-2019 | Harley-Davidson | Softail Fat Bob FXFB | – | – |
| 2018-2019 | Harley-Davidson | Softail Fat Boy FLFB | – | – |
| 2017-2024 | Harley-Davidson | Street Glide EFI FLHX | – | – |
| 2017-2024 | Harley-Davidson | Electra Glide Ultra Limited FLHTK | – | – |
| 2017-2024 | Harley-Davidson | CVO Street Glide FLHXSE | – | – |
| 2017-2024 | Harley-Davidson | Road King Special FLHRXS | – | – |
| 2017-2024 | Harley-Davidson | Electra Glide Police FLHTPI | – | – |
| 2017-2024 | Harley-Davidson | Road Glide Custom FLTRX | – | – |
| 2017-2024 | Harley-Davidson | Road King Police FLHP | – | – |
| 2017-2023 | Harley-Davidson | Street Glide Special FLHXS | – | – |
| 2017-2023 | Harley-Davidson | Road Glide Special FLTRXS | – | – |
| 2017-2022 | Harley-Davidson | Road King EFI FLHR | – | – |
| 2017-2021 | Harley-Davidson | CVO Electra Glide Ultra Limited FLHTKSE | – | – |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Limited Low FLHTKL | – | – |
| 2017-2019 | Harley-Davidson | Road Glide Ultra FLTRU | – | – |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Classic EFI FLHTCUI | – | – |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer’s information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.
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