Hardrace Audi B9 Rear Anti-Roll Bar (Quattro)
Keep your Audi B9 Quattro flatter and more predictable in corners with this Hardrace rear anti-roll bar. A rear anti-roll bar (also called a sway bar) links the left and right rear suspension to reduce body roll. In simple terms, it helps the car stay level when you turn.
What it does and why it matters
This bar increases rear roll stiffness. That reduces understeer, improves steering response, and gives a more balanced feel. You get more confidence on fast B-roads and smoother, more stable direction changes.
- Flatter cornering and better control
- Helps reduce understeer for a more neutral balance
- Sharper, more direct steering feel
- Stable high-speed lane changes and sweepers
- Hollow, heat-treated design for strength without excess weight
- OE-direct fitment for a clean, bolt-on install
Design and build
Hardrace uses a hollow internal structure and heat treatment to deliver high strength with reduced weight. It is designed as an OE direct replacement, using factory mounting points. No cutting or custom work is needed.
Note: A stiffer rear bar can make the ride feel firmer over uneven roads. This is normal for performance handling parts.
Fitment
Fits popular Audi B9 Quattro models. Please use our vehicle lookup to confirm compatibility with your exact car, or check the Vehicle Fitment tab for full details.
Installation
Direct bolt-on replacement. Professional installation is recommended. Torque all fasteners to the manufacturer specification, with the vehicle at normal ride height.
| Brand | Hardrace |
| Product SKU | HRD-Q0875 |
| Position | Rear |
| Drive type | Quattro (AWD) |
| Construction | Hollow, heat treated |
| Replacement type | OE direct replacement |








