Just to share what I had done with my Marauder after some homework. The most restrictive part of the exhaust is after the cats where it narrows down to 2 inches, perhapes to build torque in a car that needs it badly when stock. I went with a 2 1/4 inch Magnaflow custom X pipe from the cats to the polished 18 inch Magnaflow mufflers. From the mufflers I used the Megs Preproduction Marauder tips w/out baffles. I saw a car with 2 1/2 inch exhaust and it sounded terrible, way to loud for the car, as well as having less torque on the dyno than mine, both being eaton equipped cars. The difference appears to be the exhaust size. My only plans are to put on a set of High Flow Magnaflow Cats, but the system will remain 2 1/4 in piping. If you look in the Picture Gallery, you will find the pictures I posted of my exhaust upgrades. For what its worth, something more to check out before making up your mind. By the way, I spent maybe $250 in parts for the mufflers, custom X pipe, and parts, and I think the Magnaflow Cats are under $200.