JE Ultra Series Subaru EJ Series Piston Kit – 99.75 Mm Bore – 1.209 In. CH, -16.90 CC
JE Pistons is the leader in forged racing pistons. With 70-plus years of experience, in-house forging, and industry-leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports.
Specifications :
| Piston Series | JE Ultra Series |
|---|---|
| Cylinder Head | EJ257 STI |
| Bore Diameter | 99.75 MM |
| Piston Head Type | Dish |
| Compression Height | 1.209 IN |
| Piston Volume | -16.90 CC |
| Piston Material | 2618 |
| Forging Type | FSR |
| Piston Average Weight | 427 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 |