this is in my opinion, but i just recently got my exhaust installed, its a bbk off road x-pipe with the borla stingers cat back. man i love the sound, it is i would say the loudest ive heard so far, my buddy has a sonic blue 03 w/ bassani x and cat back and i think im a tad bit louder than him, and ive also heard a mach 1 w/ headers, xpipe and magnapack....just my opinion, but i would highly recommend this combination....