Originally Posted by Orb
I'm not sure it would be worth doing any other bushing on this car as the other ones are the same as the M3. If you go with really stiff race spring then it might be worth it but it is better to balance out the system. To stiff of bushings and the car with resonate all over the body which will be a function of spring rate as well. It is best to be safe and do a modest upgrade.
The rubber strut top mounts need to go. The for and aft movement in these have large deflections as well and with the combination of the stock lower control arm mean huge under steer when pushed hard. I am finally on the last leg of the road getting this best to handle at the track.
I am sure you did your home work, but you left out the front thrust arms!
That is a major weak point in the 335i and can cause the car to lose much needed castor!