I am going to install my bassani x-pipe in a day or two should I remove the cats or keep them I also have magnaflow catback already on the car any suggestions thanx.
It's definately going to be louder and get some extra HP without them...Question is, do you want to put them back on everytime you get a sniffer test (if you have one you have to pass in your area) or risk getting pulled over without them and have the cop look under to see you don't have them? Will that happen, probably not...Hence why most people don't run with them...I haven't had them on my car for over 2 years now...