JE Pistons
JE Pistons Ultra Series Piston Kit - 391731 For Harley Motorcycles 2018-2026
MPN:
391731
SKU:
0910-6859
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JE Pistons
JE Pistons Ultra Series Piston Kit - 391731 For Harley Motorcycles 2018-2026
MPN:
391731
SKU:
0910-6859
SKU:
0910-6859
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 two pistons, premium ring pack, wrist pins and wire locks
Specs
Units
Kit
Piston Head Shape
Dished
Stroke Length
4.500"
Bore Size
4.250"
Bore - Oversize
Standard
Product Name
Piston Kit
Riding Style
Street
Bore Oversize
Standard
Compression Ratio
11.25:1
Model
Ultra Series
Piston Material
Forged 2618 Aluminum
Part Notes
Kit Includes:
• 2x Ultra Series Pistons
• 2x Wrist Pins
• 2x Ring Sets
• 2x Wire Locks
Regular price
$682.99
Unit price
Shipping calculated at checkout.
Product Details
Features
- 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 two pistons, premium ring pack, wrist pins and wire locks
Specs
| Units | Kit |
| Piston Head Shape | Dished |
| Stroke Length | 4.500" |
| Bore Size | 4.250" |
| Bore - Oversize | Standard |
| Product Name | Piston Kit |
| Riding Style | Street |
| Bore Oversize | Standard |
| Compression Ratio | 11.25:1 |
| Model | Ultra Series |
| Piston Material | Forged 2618 Aluminum |
Part Notes
- Kit Includes:
- • 2x Ultra Series Pistons
- • 2x Wrist Pins
- • 2x Ring Sets
- • 2x Wire Locks
Product Description
Features
- 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 two pistons, premium ring pack, wrist pins and wire locks
Specs
| Units | Kit |
| Piston Head Shape | Dished |
| Stroke Length | 4.500" |
| Bore Size | 4.250" |
| Bore - Oversize | Standard |
| Product Name | Piston Kit |
| Riding Style | Street |
| Bore Oversize | Standard |
| Compression Ratio | 11.25:1 |
| Model | Ultra Series |
| Piston Material | Forged 2618 Aluminum |
Part Notes
- Kit Includes:
- • 2x Ultra Series Pistons
- • 2x Wrist Pins
- • 2x Ring Sets
- • 2x Wire Locks
Part Numbers
| Store SKU | MFR. Product # | Availability |
|---|---|---|
| 0910-6859 | 391731 | In Stock |
Fitment
This product is vehicle specific.
Select your vehicle to confirm fitment.
This Product Fits
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.
Customer Reviews
JE Pistons Ultra Series Piston Kit - 391731 For Harley Motorcycles ...
Regular price
$682.99
Unit price
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