KoukiMonsta
04-13-2009, 03:28 PM
So im thinking i want to swap my test pipe for a high flow cat to be a little green and try to cut down the fumes in the garage. im running a redtop with gt25, injectors, 3" exhaust all the way. would i need a new tune or do the cats flow enough? and any recommendations on which cat to use? thanks.