| Specification | Value |
|---|---|
| Piston Head Shape | Dished |
| Skirt Coating | Tuff Skirt |
| Model | Ultra Series |
| Product Name | Piston Kit |
| Bore Size | 4.250" |
| Stroke Length | 4.500" |
| Riding Style | Street |
| Compression Ratio | 10.25:1 |
| Units | Kit |
| Bore Oversize | Standard |
| Type | Forged Side Relief Design |
| Bore - Oversize | Standard |
| Piston Material | Forged 2618 Aluminum |
- 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
- Tuff Skirt is a propriety, moly based dry film skirt coating that is applied in-house and reduces operating friction for better wear resistance
- Offset pin reduces piston rock and minimize engine operating noise
- Skirt notches for optimal clearance at the bottom dead center
- Kit includes two pistons, premium ring pack, wrist pins and wire locks
FITMENTS
| Year | Make | Model |
|---|---|---|
| 2018-2021 | Harley-Davidson | FLHTKSE CVO Limited |
| 2022-2023 | Harley-Davidson | FLHXST Street Glide ST |
| 2018-2022 | Harley-Davidson | FLTRXSE CVO Road Glide |
| 2018-2022 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2022-2023 | Harley-Davidson | FLTRKSE CVO Road Glide Limited |
| 2022-2024 | Harley-Davidson | FXLRS Low Rider S 117 |
| 2022 | Harley-Davidson | FXRST Low Rider El Diablo 117 |
| 2020-2022 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide |
| 2022-2024 | Harley-Davidson | FXLRST Low Rider ST 117 |
| 2024 | Harley-Davidson | FLHX Street Glide |
| 2022-2023 | Harley-Davidson | FLTRXST Road Glide ST |
| 2023-2024 | Harley-Davidson | FXBR Breakout 117 |
| 2024 | Harley-Davidson | FLTRX Road Glide |
- MAP:
- Yes
