can add an endorsement, as I put one of these on my 318is over this past weekend. Quite simple to install, and definitely did make a difference. the car definitely pulls more willingly in the upper range, accompanied by a not too intrusive but definitely noticeable intake howl..if you like hooning around town looking to get a ticket, this'll do it!!:eek: seriously tho, it does change the personality just a bit, and I have found myself stepping on it more just to get the rush of acceleration and noise...so do use responsibly!
Geoff