Originally Posted by e90TiAg335i
It's interesting that no one seems to have a problem installing the HO 4"s in an e90. I know there's "supposed" to be plenty of room. Unfortunately, mine hit the window on both sides. Wasn't obvious until I rolled up the windows.
The driver side just barely rubs the window enough to see the door panel move. The pass side was close enough to tear the vapor barrier.
Looks like I'm just going to install them from the front like you have above. Just a heads up for others. I really don't know why mine are hitting. I'm using the same setup as VPElectricity has.
If you're pulling your door panels soon, I'd like to see pics of your mounting setup. Perhaps I can make some suggestions.
I initially had rubbing problems with the Rainbow Vanadiums I test-fit a long time ago, so I know what they look like. I have also seen rubbing problems in an X3 before modding the mounting to fix that.