Thanks snrusnak! lol I was a bit slow on that one :P Didn't realize he had the newer PowerTech 4.7 instead of the Magnum. Glad you found a set of OBX Shorties, they make a great product for what you pay. As far as high-flow cats go, I know there are quite a few companies that make them but you're better off calling companies like Magnaflow and Borla so you can get exactly what you need. They're pretty good about giing you the right parts once you give them your dimensions.