I just got mine put in. I have a CAI and borla cat back done already. (3.4 pulley, 180 t stat sitting on my bed). Anyways. What did you guys think of your exhaust sound after your Cat was done. I hear a different sound coming from the CAT area. I think it might be an air leak or can you actually hear a flowing sound. I don't know. But I love the overall sound. Nice little power increase. Is it possible that I lost low end torque like with the cat back??????

Does your exhaust sound different after the new cat besides the noise you were talking about? Does the exhaust sound more powerful or loud?

Not much louder but a bit. More powerful yes. It is awesome.