Browse Ford Mustang Exhaust Gas Recirculation Valve Cost & Ford Mustang Exhaust Gas Recirculation Valves Location. Shop Ford Mustang EGR Valves. Maintaining the EGR valve on your Ford Mustang is crucial for optimal performance and longevity. Regularly inspecting for clogs and ensuring a clean connection can prevent malfunctions. Signs such as rough idling and reduced fuel efficiency may indicate a need for replacement. Selecting the right EGR valve involves choosing between a vacuum-operated or an electronic variant, each offering distinct advantages in response and control. When shopping online, look for high-grade materials and confirm compatibility with your Mustang model for a seamless installation, ultimately enhancing engine efficiency and reducing harmful emissions.