I discovered this weekend that one of my car's previous owners removed the muffler but kept the catalytic converter. I've been wanting to do something to improve flow, reduce turbo lag, and make my note a little louder. It has been suggested to replace the cat with a bypass pipe and keep my existing muffler. I like the note but just want it a little louder. My recent discovery changes everything though. If I remove the cat now, I'll have a straight pipe. My neighbors probably wouldn't appreciate that very much. So, the way I see it, I have two choices. The first is to go with a high-flow cat and continue to run without a muffler. The second is to ditch the cat and install a muffler. I don't know which is the best for flow, and I'm concerned that if I mess with it too much, the note will change completely. I've read that Random Technologies has a cat that flows more CFM than a muffler, so that might be an option, but if the best way to go is to remove the cat and go with a muffler, I'm afraid that I'll destroy the sound in doing so, not to mention about the illegalness of doing that. Does anyone have any advice on this?