I opted not for the PV cat back as I remember the new piping is no bigger or just slightly then stock. I was going to do a complete header and cat back+exhaust. Tone was clear no added performance in headers, and the no size diffference in new cat back piping made me opt for custom stainless to be done instead. I got a good deal on a sebring straight thru. Is loud but dynamat took care of that. Power and torque gains were considerable feeling. I had back pressure doubts bing I went with 3.5" but no issues at all-