The exhaust gas recirculation (EGR) system is an emissions reduction system. The EGR valve is operated via vacuum passed to it from the EGR Solenoid. The computer sends a signal to the solenoid (during part throttle cruise conditions) which send vacuum to the valve, causing it to open at a varying amount. Its purpose is to reroute burnt exhaust gases back to the intake air. The effect of the introduction of inert or incombustible gas increases gas mileage by displacing burnable oxygen/fuel withought effecting the air/fuel ratio. It decreases cylinder temperature (less boom, less heat), increases gas mileage (less oxygen, less fuel needed), and reduces the amount of NOx getting into the atmosphere. So, why remove it then?

A negative effect of the EGR, is that it introduces hot exhaust into the intake. This heats intake air temps, and can heatsoak the intake manifold causing reduced wide open throttle performance. That is the reason for this mod, where a plate replaces the valve, eliminating intake air mixing with hot exhaust.

**NOTE* This modification is not emissions friendly (or technically legal). If you have regular testing in your area/state, this modification will cause you to fail. This is a race-only modification. The author or website is not responsible for any outcome that may come due to this modification.