Wanted a cat-back exhaust for my BMW E90 325i. The exhaust for my cars was not in stock, but I was able to be notified as soon as it did come back into stock. As soon as it did, I got it ordered and the process was swift and easy. Product arrived well packaged and protected. Fitted to the car with a bit of modification but pretty much a straight fit. Had it on the car a year now and cannot fault it. It doesn't drone too much if at all at motorway speeds but it also isn't obnoxiously loud around town/in traffic. Daily driven the car with the exahust and cannot fault it! Definitly one of the best mods for a nice sound. Would definitely recommend Gravity Performance if looking for a decent but well priced exhaust or any other parts for that matter.