I am not that big of a car buff so of course I got a question. What is a cat-back exhaust? I know it is changing the pipes right after the catbox and you are supposed to get an increase in performance. My question is how much of a performance would a typically cat-back give and are they generally loud? Or can the loudness be changed through the pipe, muffler, or tip? I was talking to this guy about getting a custom exhaust for my krom for $500. I am thinking of running dual exhaust with the tips coming out of the black holes in the bumper. I am not sure if wit will work out not though with the spare tire location. If not a single exhaust will work and was thinking of have a fake tip placed in the passenger side. Do you think $500 would be too much?