Or find someone with HPTuner or some other software to turn them off. You may have to pay a licensing fee but it may be worth it to you just for that. Do it before the header install. Not too sure how far up into OK you are but I'm in Denton and to license your truck to turn the codes off will cost me $100 to do that or you can go to one of the other guys that are a little further away and can do some tuning tweaks for you later.