ACDelco 12553837 GM Original Equipment Lower Intake Manifold Kit with Tube Thermoplastic, aluminum, and cast iron intake manifolds available for a wide range of applications Designs are enhanced and amended to incorporate updates, upgrades, and Technical Service Bulletins GM-recommended replacement part for your GM vehicle's original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function