ACDelco 214-2020 GM Original Equipment EGR Valve Kit with EGR Valve, Pipe, Connectors, and Gasket Modulates the flow of exhaust gas into the intake manifold to reduce nitrogen oxide (NOx) emissions GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function