Originally Posted by Smooth 330i
I would not want to combine M3 arms with 17" RFT. If you want to improve your steering feedback you need to consider wheels, tires and control arms together as a system. M3 arms are excellent if you use non-rft summer tires.
What are your wheel and tire specs, and brands?
I recently finished installing the items shown in my signature block. I started with a base suspension 335d. I am currently running 17" with Blizzak LM-25 RFT, although shortly I will be going to 18" Michelin PSS non-RFT. I can tell you the M3 control arms made a very big difference in the steering response. In my case, you better be sure you really want to turn before you turn the wheel, because with the M3 bits you are definitely immediately going to go where you point, and pronto. As a side note, and probably a combination of camber and the other bits, my steering effort is a little more at slower speeds with the new setup.