Red steel strut brace for Audi A4 B7 — TA Technix

The brace connects the two suspension strut mounts. In a hard corner, the loaded suspension side pushes outward and the geometry deteriorates precisely when you need it most: the brace distributes the load between both sides.

The front end becomes more precise on turn-in, and the car maintains the same response from one corner to the next. The effect is clear on older chassis, convertibles, and high-mileage cars; it is more subtle on a modern, already rigid body.