A Fuel Bleed Boot is a rubber hose that connects the fuel pressure regulator to the fuel rail. It allows air to escape from the fuel system when the pressure regulator is relieving pressure. This prevents the fuel system from becoming over-pressurized.Attributes: • Cools the fuel and prevent vapor lock• Manufactured to precise specifications and are built for durability and reliabilityApplications:A Fuel Bleed Boot prevents fuel from flowing back into the fuel tank when the engine is not running.