I was wondering if any one has a diagram of how the egr system works. I was currious how the gasses go from the ports in the heads, through the intake and throttle body spacer. Also how the gasses go from the piping on the rear of the heads, smog pump, h-pipe air tube, ect. I am wanting to eliminate my egr spacer. I have no smog pump and the tubes coming off the back of the heads are already capped off.