JE Ultra Series forged piston set for the Subaru EJ25. 100mm bore, 8.5:1 compression with a -17.3cc dome and 0.905in pin. Uses JE's Aligned Grain Flow forging with a thermal-barrier crown coating, skirt coating and lateral gas ports — built for high-boost builds. Made in the USA. Set of 4.
| Type | Ultra Series forged piston set |
| Engine | Subaru EJ25 |
| Bore | 100mm |
| Compression | 8.5:1 (-17.3cc) |
| Pin | 0.905in |
| Material | Forged aluminum |
| Quantity | Set of 4 |
| Part Number | 361329 |
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