JE forged piston kit for the Subaru EJ257 block with EJ20 head (hybrid STI build). 99.5mm bore, 8.5:1 compression. Forged from 2618 aluminum in the USA with an FSR design; includes wrist pins, locks and JE Pro Seal premium rings. Set of 4.
| Type | Forged piston kit (FSR) |
| Engine | Subaru EJ257 block / EJ20 head |
| Bore | 99.5mm |
| Compression | 8.5:1 |
| Material | 2618 forged aluminum |
| Quantity | Set of 4 |
| Part Number | 291059 |
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