Prodigy said that it should not be a problem as long as the exhaust has LESS back pressure than the stock exhaust, which is most likely to be true for aftermarket exhaust. Since I don't have a specific exhaust in mind, it was all theoretical discussion. If you either already have aftermarket exhaust, or would like aftermarket exhaust, I suggest you talk to Wes at Prodigy about it before making any commitments.