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The Cusco rear sub-frame brace offers increased performance two different ways. The first is by stiffening up the rear sub-frame of the Impreza by connecting both sides of the body.
Secondly, the brace can be used with the bracket kit to retrofit the '06 STi diffuser on the older Impreza models to help with aerodynamics. Be sure to check out the bracket kit, diffuser and diffuser bolts to complete the retro-kit!
| Fitment Years | Subaru WRX | Subaru STI |
|---|---|---|
| 2002 | ✓ | |
| 2003 | ✓ | |
| 2004 | ✓ | ✓ |
| 2005 | ✓ | ✓ |
| 2006 | ✓ | ✓ |
| 2007 | ✓ | ✓ |
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.
| Manufacturer's Part Number | 673 487 A |
|---|---|
| SKU | cus673 487 A |
| Brand | CUSCO |
| Product Type | Drivetrain |
| Drivetrain | Mounts and Chassis Bracing |






