£849.43
Impreza WRX STI 2.5 16v Fast Road Forged Piston Kit.
Manufacturer kit reference: K9131
| Engine Code | EJ257 |
|---|---|
| YOM From | 2004 |
| YOM To | 2008 |
| Bore Size | 100.5mm , 100mm , 99.25mm , 99.5mm |
| Stroke | 79mm |
| Compression Height | 30.7mm |
| OEM Comp Ratio | 8.4:1 |
| Number of Rings | 3 |
| OEM Rod Length | 130.5mm |
| Clip Part Number | CA23 |
| Pin Size | 23mm |
| Pin Part Number | WP024 |
| Cylinders | 4 |
| Valves Per Cylinder | 4 |
| Suits Wossner Con Rod | G0012 |
| Con Rod Length C/C | 130.5mm |
| Piston reference | Piston diameter | Compression ratio | Capacity |
|---|---|---|---|
| K9131D025 | 99.75mm | 8.57:1 | 2481cc |
| K9131D050 | 99.92mm | 8.6:1 | 2481cc |
| K9131D100 | 100.42mm | 8.68:1 | 2506cc |
| K9131DA | 99.42mm | 8.53:1 | 2456cc |
Piston diameter and cylinder bore are different measurements. Select the correct size and confirm the engine specification before ordering.