I'll have to double check..last time I looked (when I had seafoam) I could only find that main brake line...but that was when I first got truck.


I have a relatively stock motor, and just a bully dog power pup tuner...no need for widebands lol. I was actually just going to hook the a/f gauge up AFTER the cats, so i know the signal going to computer for actual a/f is accurate.