2004 Subaru Impreza WRX STI
Transmission gear ratios, final drive data, and drivetrain specs for the 2004 Subaru Impreza WRX STI.
US specification / GD / STI
Sources & engine identity
- 2004 Subaru Impreza specificationsgear ratios, reverse, final drive, tires
Engine designation EJ257 linked to ACES base vehicle 18021 via SEMA Data / FRSport. ACES identifies fitment; the factory references supply gearing and RPM.
Stock manual / 6-speed / transmission source
Transmission gear ratios
| Gear | Ratio | Overall | Step |
|---|---|---|---|
| 1 | 3.636 | 14.180 | - |
| 2 | 2.375 | 9.262 | 1.531 |
| 3 | 1.761 | 6.868 | 1.349 |
| 4 | 1.346 | 5.249 | 1.308 |
| 5 | 0.971 | 3.787 | 1.386 |
| 6 | 0.756 | 2.948 | 1.284 |
| R | 3.545 | 13.825 | - |
Overall = gear ratio × final drive. Step = previous ratio ÷ current ratio.
Final Drive: 3.9Overall Spread: 4.810