JE Ultra Series Subaru EJ Series Piston Kit – 99.52 Mm Bore – 1.209 In. CH, -16.50 CC
Equipped with custom level features including thermal barrier crown coating, skirt coating, gas ports, and more, Ultra Series are the ideal pistons for your high-boost build. As with all JE Pistons products, Ultra Series pistons are made 100% in the USA.
Specifications :
| Piston Series | JE Ultra Series |
|---|---|
| Cylinder Head | EJ257 STI |
| Bore Diameter | 99.52 MM |
| Piston Head Type | Dish |
| Compression Height | 1.209 IN |
| Piston Volume | -16.50 CC |
| Piston Material | 2618 |
| Forging Type | FSR |
| Piston Average Weight | 425 GR |
| Ring Set Included | Yes |
| Top Compression Ring Thickness | 0.0475 IN |
| Second Compression Ring Thickness | 0.0480 IN |
| Oil Ring Thickness | 0.0995 IN |
| Wrist Pin Material | 9310 Nickel Carbon Steel Alloy |
| Wrist Pin Length | 2.250 IN |
| Wrist Pin Wall Thickness | 0.210 IN |