BMW driveshafts are not serviceable. This means that when the U-joints wear out, it is time to replace the entire shaft. If you have increased power levels due to turbo or supercharging, an upgraded driveshaft may be essential to safely transferring that power to the wheels.
The VTT A90/91 Supra Carbon Fiber Driveshaft is the definitive solution for MK5 owners who demand ultimate strength without the drag of a heavy OEM assembly.