Sorry for the ridiculous Noob questions but. . .
What is this?
What exactly does it do?
I have a 07 328i E90 and a 06 330i E90. . . I want to Mod both exhausts. . .
I've asked around in a thread i posted but didn't get too much input(As much as i hoped)
http://www.e90post.com/forums/showthread.php?t=141527
So will these fit on either car?
Again sorry if it's a stupid question. . .