Hey Guys, I have a 99 cobra with Jet chip and an intake. I was wodering if I were to buy a 3" cat back, take off the mufflers and put straight pipes on. would that help me with more performance then a cat back w/mufflers? or should i leave them on? if you are wondering do i care about the sound? police? NO. Don't give a hoot an hell about those PO PO's. Thanks