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This JE Pistons Ultra Series single replacement piston for Subaru EJ205 WRX engines brings forged 2618 aluminum construction to a performance engine rebuild or replacement assembly. Its Forged Side Relief (FSR) design uses a reduced skirt width and shorter wrist pin to help limit friction and reciprocating weight. The application-specific crown, ring grooves, and pin dimensions provide the detailed configuration needed when matching an individual piston to an existing JE setup. Precision machining and decades of JE motorsport experience support a durable component for demanding engine use. Supplied as one right-side piston with rings included, this replacement provides the specified bore size and crown volume without requiring the purchase of a full four-piston kit.
| Specification | Details |
|---|---|
| Brand | JE Pistons |
| Manufacturer Part Number | 361322R |
| SKU | JEP361322R |
| UPC | 193564020208 |
| Series | JE Ultra Series |
| Engine Application | Subaru EJ205 WRX engines |
| Engine | EJ Series |
| Cylinder Head | EJ205 WRX |
| Vehicle Make | Subaru |
| Engine Type | Internal Combustion |
| Bore Diameter | 92.50 mm |
| Compression Height | 1.287 in |
| Piston Material | Forged 2618 Aluminum |
| Piston Quantity | 1 |
| Piston Orientation | Right |
| Piston Design | Forged Side Relief (FSR) |
| Piston Crown | Domed |
| Piston Volume | -3.80 cc |
| Average Piston Weight | 390 g |
| Piston Rings Included | Yes |
| Associated Part Number | 905-042-CT |
| Top Ring Thickness | 0.0395 in |
| Second Ring Thickness | 0.0480 in |
| Oil Ring Thickness | 0.1110 in |
| Wrist Pin Diameter | 0.905 in |
| Wrist Pin Length | 2.250 in |
| Wrist Pin Wall Thickness | 0.210 in |
| Wrist Pin Material | 9310 Nickel Carbon Steel Alloy |
| Product Type | Engine Piston |
| Product Market | Sport Compact |
| Industry | Automotive |
| Country of Manufacture | USA |
