Ensure consistent fuel flow in your diesel or gas engine with our 5/16" 8mm One Way Fuel Flow Check Valve. This high-quality valve is designed to allow fuel to flow in only one direction, preventing backflow and ensuring that your engine gets the fuel it needs. With a one year unlimited mileage warranty, you can trust that it's built to last. Don't let faulty fuel flow hold you back any longer. Get our One Way Fuel Flow Check Valve today and experience the difference it makes.