Aluminum One Way Check Valve with -6an Male Fittings If your vehicle is using

If your vehicle is using aftermarket components

the IAC valves adjust the airflow to improve motor idling

They are designed to position the starter to ensure proper starter drive to flywheel ring gear alignment

including most aftermarket and OEM gauges

you must use one that is also approved as street legal for your application

Aluminum One Way Check Valve with -6an Male Fittings If your vehicle is usingSpeedmaster one way check valves are designed to prevent the back flow of any fuel, coolant, or oils. Their design provides minimal flow restriction, and the high quality construction of the Speedmaster one way check valves ensures long lasting performance.