[cpt97m3]

Originally Posted by Bimmer-Bob

Congrats on the install. I did the same on my 128i (but with PSS9's) about a year ago. I also did camber plates at the time and, like you, I'm considering the M3 control arms. Would also like to do the M3 rear subframe bushings, which has me thinking about a rear sway bar as well (since it saves a lot of labor to do both at once).

Curious how you came up with 15 mm for the rear sway? I think the Dinan bar is 15 mm, but I don't know of any others. The stock sport suspension one (which I have) is 12 mm, and the M3 rear bar is 20 mm. I've considered Dinan's 15 mm bar since it theoretically represents a happy medium, but I don't really know if I shouldn't just stick with what I have. I'd like to hear your logic - in almost 2 years of posting to these forums, I have yet to see much of a consensus on this issue.

Thanks.

Hotchkis also has a 15mm bar, but I think Tom is considering the E93 regular 3 series rear bar which is 15mm. The E9x 3 series have a 13mm, 14mm, and a 15mm rear bar depending on the model.