Originally Posted by HP Autosport
Yes, M3 guide rods will help. So will upgraded rear toe arms.
Although this upgrade may help with wheel hop issues, it will also transmit too much driveline noise to the cabin of the vehicle. Solid differential bushings belong to a track/race car only, NOT on a street car.
You would think so, but suprisingly it's not that bad. There is a bit more whine but not that much more than was already present. I daily drive this car and don't find it annoying. Of course of people's experiences and tolerances may vary.