I installed AC Schnitzer springs over a month ago and they have been great. No issues or noises at all. When i purchased mine I had not heard anything about the noise but shortly after my install I read about two or three instances where the springs were making noise. Before I bought mine I did about three months of research and never saw one post complaining about noises from the springs, so this may be an isolated issue. If you want great handling, great comfort and a substantial drop without looking slammed; these are your springs.
Here are some photos of the drop of my car with ACS springs and 21" wheels.
Originally Posted by tp550i
I am wondering if this is isolated to the 535 springs. I never had an issue on my 550 - possibly the coil spacing and diameters are different on the 535 vs 550 due to the weight differences? I know they are different part numbers. Really like these springs
I have a 535i and have not had any noises coming from the springs.