hi. im planning on installing my headers and catback exhaust soon, so i have to take the CAT out reguardless so should i gut it out? i have heard people do this, but does it really add any gains, and more importantly, will i pass emissions testing in philly? if anyone has done this, please let me know.
by the way.. the headers are dc sports ceramic coated and exhaust is r*sr catback. thanks!