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The JE Pistons forged piston kit for Subaru EJ25 SOHC gives your performance engine build a strong foundation for demanding street, track, and racing use. Manufactured in the USA from 2618 aluminum, these pistons combine durable construction with JE's application-specific engineering and decades of motorsport experience. The full round skirt design provides a conventional piston profile, with crown geometry and dimensions developed for the specific engine application. Precision machining carries that design through to the finished piston, giving engine builders a purposeful component for a performance short block. Supplied as a set of four with piston rings, this kit brings proven materials and carefully developed dimensions to your next engine build.
| Specification | Details |
|---|---|
| Brand | JE Pistons |
| Manufacturer Part Number | 314344 |
| SKU | JEP314344 |
| UPC | 193564041142 |
| Series | JE Pistons |
| Engine Application | Subaru EJ25 SOHC |
| Engine | EJ Series |
| Cylinder Head | EJ25 SOHC |
| Engine Displacement | 2457 cc |
| Vehicle Make | Subaru |
| Engine Type | Internal Combustion |
| Bore Diameter | 99.50 mm |
| Compression Ratio | 11.5:1 |
| Compression Height | 1.162 in |
| Piston Material | Forged 2618 Aluminum |
| Piston Quantity | 4 |
| Piston Design | Full Round Skirt |
| Piston Crown | Domed |
| Piston Volume | 3.00 cc |
| Average Piston Weight | 412 g |
| Piston Rings Included | Yes |
| Ring Part Number | JG4901-3917 |
| Associated Part Number | JG4901-3917 |
| Top Ring Thickness | 0.0480 in |
| Second Ring Thickness | 0.0480 in |
| Oil Ring Thickness | 0.0995 in |
| Top Ring Groove Width | 0.04800 in |
| Second Ring Groove Width | 0.04800 in |
| Oil Ring Groove Width | 0.09950 in |
| Wrist Pin Diameter | 0.905 in |
| Wrist Pin Length | 2.250 in |
| Wrist Pin Wall Thickness | 0.180 in |
| Wrist Pin Material | 5115 Low Carbon Steel, Case Hardened |
| Connecting Rod Length | 5.181 in |
| Engine Stroke | 3.110 in |
| Piston-to-Wall Clearance | 0.0036 in |
| Intake Valve Relief Depth | 0.150 in |
| Intake Valve Relief Angle | 23° |
| Exhaust Valve Relief Depth | 0.150 in |
| Exhaust Valve Relief Angle | 23° |
| 3D Undercrown Milling | No |
| Accumulator Groove | Yes |
| Anodized Top Ring Groove | No |
| Combo 2 | No |
| Contact Reduction | No |
| Double Pin Oilers | No |
| DVGP | No |
| Economy Undercrown Milling | No |
| EN Plating | No |
| Gas Distribution | No |
| Lateral Gas Ports | No |
| Milled Undercrown | No |
| Precision Pin Fit | Yes |
| Skirt Coating | Yes |
| Smooth Crown Finish | Yes |
| Thermal Crown | No |
| Tuff Skirt | No |
| Ultra Dome | No |
| Ultra Groove | No |
| Ultra Groove with Gas Port | No |
| Vertical Gas Ports | No |
| Product Type | Engine Piston Kit |
| Product Market | Sport Compact |
| Industry | Automotive |
| Country of Manufacture | USA |
