im about to order an x pipe but i dont have a tuner yet. im almost possitive this will turn the check engine light on but will the tuner fix that problem or will i have to get it tuned?
I ran a catted SLP X-pipe for over a year without a tuner and never had a problem. The CEL was on the whole entire time, but there were no problems with the vehicle itself. I now have a Tuner and had Doug @ Bamachips turn off the rear O2 sensors so the CEL is no longer on.