Installed my Magnaflow Cat Back yesterday, it was very easy to install. Everything fit together as it should, no filing or prying required. I did have to take off one of the tip hangars to get the new tip to go on, but that only took a few moments. As for the sound, kind of quiet at idle, but louder than stock. Under acceleration it definitely gets louder and deeper but not obnoxious. I would recommend this system to anyone. Now my Cobra sounds as good as it looks, and it's a lot more fun to drive when you can hear that exhaust note!