Sorry if this has been answered already. I've got a Mac off road h-pipe and am getting the mils. Is there something that i put in the holes in the h-pipe where the o2 sensors are suppose to go that i'm plugging in the mils?
u just transfer the o2's from the old h-pipe to the new one...and then u plug the mil's in between the harnesses that connect the o2 sensor to the car's computer