JMH, There's alot you can do with your exhaust system. I tried a few things until I found what I liked. I have 2.25 inch pipe from the manifold back. I replaced the resonator(small muffler) with a Flowmaster 2 chamber delta flow muffler. That was a bit loud, sounded really neat though. So I added a small generic muffler out back to mellow things out. It sounds great now. Beefy, yet not too loud. I don't have stainless steel pipes. I don't think there will be a problem. As far as adding a second pipe, might be tough. There is not much room for that stuff under a 123. You could get a dual stainless tip. That would look cool. andy