See attached pic... best I could manage in the dark. You can see that the little vacuum line runs to the split air pipe under the check valve. You can also see the Air control valve and one of the port actuators that you're missing. And yes, if you're missing the actuators and the ports are not wired open, you are losing top end, conversely, if they are wired open... you lose a little low end. That's why they exist
*Nevermind the green twist tie mod, I can't disclose the horse power gains per my mechanics wishes
