Someone told me that if I took my cats out that the motor would either run lean or rich? Is this true? My tune doesnt have the cats delete as of right now, but all i have to do is make a call and get one on the way with it. But in the mean time, if I do my headers and no cats, it iwll just throw a code till I get my tune right? its going to run ok? not rich or lean but the same?