i know some people that can make me a 3 inch exhaust to a muffler no cats at all. This meaning a full setup from the turbo all the way back and an upipe . I was even thinking of making one myself but they can probably do it for under 200. My question is is 3 inch to big and also how much of a benefit would i get from having no cats at all? I know some people that will pass my smog for 50 bucks but do they check at the track? maybe i can make a fake cat?