Thank you very much for this post. I recently purchased a 2013 FR-S with Five Axis Edition Kit. It includes the Body Kit, 19" wheels and Tein High Tech Lowering Springs (but factory OEM suspension).
http://www.fivead.net/edition-vehicl...cion-fr-s.html
I am not a professional or a racer, just an enthusiast, and I have to say that the ride is awesome. It has exceptional looks, it's fast, handles great - I am very happy with it. However, when I go over bumps, I hear knocking sounds from the front and rear wheels. I took the car to the mechanic, and he said that the sounds are the result of the lowering springs + OEM suspension/struts, and nothing can be done about the sounds until the proper suspension to support the lowering springs is installed. There's also a chance that the car is lower than by 0.9 (as specified in specs of the Tein Springs) What would you suggest I do? Do I just live with the noise, install different springs or get an aftermarket suspension kit? What type of suspension would you recommend?
Thanks in advance!