I came across this interesting and simple electronic exhaust mod by ZAutomotive. It allows you to bypass the exhaust module and keep the factory exhaust in full open position, without throwing any codes. It also can be used to completely eliminate it if you are doing a catback exhaust system.
Thanks! I've been thinking about changing my exhaust, but this is a simple inexpensive fix. I'm still thinking a 2.5" exhaust might be the way to go. Not sure?