I just purchased a cat back for my 2004 GTO. Has anyone ever installed this system? Any problems that I need to be aware of? All in all it looks like a very nice system for $600! I hope it sounds as good as it looks!

I installed the system last week and it sounds great! A little loud with mild highway drone, but all in all it sounds great! Gives people wiplash when I get on her! I also installed a CIA intake, diablo tune and pedders fix and this some bitch rocks now! I would swear that she has 50-60 more hp! I can't keep the tires from burning all the way through second gear (A4)!

One thing I forgot to mention was that the fitment was a little tight around the drive shaft area! Also, for some reason this system uses like 1/2 of the number of hangers. This makes the system rock a little more than stock. I am going to see what I can do to improve this condition.