Right now I have a Flowmaster Force II (3 chamber) cat-back system with a MAC Prochamber. My cat-back is rusting bad and I will have to replace it soon. I was wondering how much louder it would be with a 2 chamber muffler, and which cat-back sys. should I go with? I want something that has a deep aggressive sound to it. I would also like something in a decent price range. Magnaflow's cat-back is like 500 dollars... that's a little too much for me to spend. Also, how many chambers are in the muffler for the MAC Cat-back system? Thanks.