EGR is Exhaust Gas Recirculation. If you have it on your truck you gotta keep it there. I can't tell you if yours has one or not. It's a valve that routes exhaust gases back into the intake to take up space in the combustion chamber to reduce chamber temperatures and emissions. Look at your exhaust manifold and see if there is a valve or a pipe going to a valve attached to either one. If there is you have an EGR. But you can spend your money on a lot better things then headers for 700 bucks.