A blow-off valve is a pressure-relief device on the engine intake tract to prevent a turbocharger's compressor from going into what is known as surge. When the throttle is closed rapidly, the airflow is quickly reduced, causing air back-flow instability and pressure fluctuations.

Blow-off valves, or dump valves, are divisive. The premise is simple. In a turbocharged car, the system builds boost pressure to force extra air into the cylinders. The usual combustion business follows, with a greater amount of fuel/air mixture for bigger explosions and more power. For additional information regarding the product, please contact with dubuy support team.