[RPM90]

Originally Posted by Rossifumi

7 x 26 mm metal-matrix dome tweeters, dashboard, front & rear
7 x 100 mm ALumaprene midrange speakers, dashboard, front & rear
2 x 217 mm woofers (central bass), below front seats

http://www.bmw.harmankardon.com/en/v...technical.aspx

Yup.
The new subs are 217mm/8.5", and the E90 3 sedan and 135i that I have, have 200mm/8" subs.

In my 135i, I installed 2-8" subs made by earthquake, better rounder bass.
Earthquake doesn't show an 8.5" sub for now. I'll send them an email to see if the 8" will fit, likely not.