Picked up a Pypes Offroad x pipe up @ E-Town to go with the Pypes cat-back system I have. I asked the Pypes rep/ sales guy about the x-pipe (Cat delete) throwing a CEL light code. He said the tuner would turn off the rear o2 sensors. I don't recall this in the set up or does the tuner do it automatically? Would like to install this weekend, but don't feel like putting it in to find out it doesn't Thanks!
pretty sure the tuner does it automaticly-- you also have to return to a stock tune and drive 20-100 miles to get the computer to reset to pass NJ emmision testing
good luck with pypes system install you may have to cut the hangars off and reweld them to get a good fit