So yesterday i installed kooks long tube headers with o/r x and once i was finished my check engine light came on, so i read it with the sct tuner and its the 02 sensors. Im pretty sure what happened was that i switched them and my question is, if i did switch them would this cause any performance loss or anything for that matter?? other than the check engine light, and yes i do have a tune for LT's an o/r midpipe