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Your Subframe is attached to the cars unibody by 4 bolts/rubber bushings. All of the rear suspension connects to the rear subframe, and the OEM connections allow for a fair amount of play, which can make the rear of the car feel lose under hard cornering.
All 2002 - 2007 Impreza models actually have the required threaded mounting points already, as well as the holes in the rear crossmember, but they do not have these bolts installed. Once you install these, it will lock the crossmember to the chassis and make the rear of the car feel much more stable, and give the car a more planted feeling.
| 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 P65Warnings
| Manufacturer's Part Number | KB-066-LOCK |
|---|---|
| SKU | kbyKB-066-LOCK |
| Brand | Kartboy |
| Product Type | Drivetrain |
| Drivetrain | Mounts and Chassis Bracing |






