I was wondering if it's worth it to weld in mufflers to the stock cat-back. I just got a 96 cobra and was told it has 2 1/2 cat-back stock. Most cat-backs are 2 1/2. Would this be such a bad thing to do. I have done on a previous stang, but it was a gt. Also curious of the sound and power gains. If anyone has some info that would be great. Thanks.