JE Pistons MILWAUKEE 8 -4.250 / 1.080 Piston Kit
JE Pistons MILWAUKEE 8 -4.250 / 1.080 Piston Kit
Description
JE Pistons MILWAUKEE 8 -4.250 / 1.080 Piston Kit
As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over 75 years of experience. JE's carefully developed line of V-Twin pistons is engineered, forged and machined 100 percent in the USA and are designed for each specific engine and use application to provide the ultimate combination of durability and performance. From fun and powerful cruisers to all-out V-Twin drag racing, JE Pistons' performance is proven with every handful of throttle. Equip your bike with the best in forged pistons.
Features
- Designed specifically for each engine and use application to provide optimized performance durability
- Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
- Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
- Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 04:04:39
Note for Pistons, Rings, Rotors, Rods and engine internals
Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.
(keyword: pistons)Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | JE Pistons |
| StreetFX SKU | jep370252 |
| SFX Item ID | 4362434 |
| Accounting SKU | jep-370252 |
| Manufacturer SKU | 370252 |
| Manufacturer UPC | 193564219558 |
| Alternative References | 370252 |
| Manufacturer Attributes | |
|---|---|
| Add-On | 927-073-MW |
| Piston Volume | -6.70 |
| Second Compression Ring Thickness | 0.0430 |
| Top Compression Ring Thickness | 0.0430 |
| Oil Ring Thickness | 0.0787 |
| Wrist Pin Wall Thickness | 0.150 |
| Wrist Pin Outer Diameter | 0.927 |
| Compression Height | 1.080 |
| Bore Diameter | 107.95 |
| Compression Ratio Actual | 11.00:1 |
| Wrist Pin Length | 2.500 |
| Piston Material | 2618 |
| Piston Average Weight | 425 |
| Piston Head Type | Dish |
| Product Type | Engine Piston Kit |
| Piston Series | JE Pistons |
| Title | JE, Harley Davidson, 4.250 in. Bore, 2 Cyl. Kit |
| Title - Web | JE, Harley Davidson, 4.250 in. Bore, 2 Cyl. Kit |
| Cylinder Head | MILWAUKEE 8 |
| Industry | Powersports |
| Category Hierarchy | Powersports>Pistons>Piston Kits>V-Twin |
| Forging Type | Round |
| Product Market | V-Twin |
| Ring Set Included | Yes |
| Engine Type | ICE |
| Wrist Pin Material | 5115 Low Carbon Steel, Case Hardened |
| Out of Stock Message | Please Allow Approximately 3 Weeks or Less for Shipping |
| Bore Diameter - Web | 107.95 MM |
| Manufacturer Designation | Piston Set, 2618, Inv Dome/Dish, 4.250 Bore, 1.080 CD, 0.927 Pin, Set of 2. |
| Product Class | Engine Piston Kit |
| Construction/Type | JE, Harley-Davidson, Milwaukee 8, 11.00:1, 4.250 in. Bore, 2 Cyl. Piston Kit |
| Vehicle Designations | HARLEY-DAVIDSON 17-19 MILWAUKEE 8 |
| Product Outline | <ul><li>Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications</li><li>Designed specifically for each engine and use application to provide optimized performance durability</li><li>Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin</li><li>Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings</li><li>Made 100% in the USA</li></ul> |
| Vehicle Brief | JE Pistons, Piston Kit |
| Market Description | As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over 75 years of experience. JE?s carefully developed line of V-Twin pistons is engineered, forged and machined 100% in the USA and are designed for each specific engine and use application to provide the ultimate combination of durability and performance. From fun and powerful cruisers to all-out V-Twin drag racing, JE Pistons? performance is proven with every handful of throttle. Equip your bike with the best in forged pistons. |
Compatibility
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