The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo's compressor from going into surge. When the throttle is closed rapidly, the airflow is quickly reduced, causing flow instability and pressure fluctuations. Surge can eventually lead to thrust bearing failure due to the high loads associated with it. Blow-Off valves use a combination of manifold pressure signal and spring force to detect when the throttle is closed. When the throttle is closed rapidly, the BOV vents boost in the intake tract to atmosphere to relieve the pressure, helping to eliminate surge. Specification:

• Draw In Surrounding Air And Release A Unique Discharge Sound
• Hardened Valve For Increased Durability
• High-Quality Diaphragm And Short Stroke Significantly Increase Response
• Dual Spring System Promoted Response And Allows For High Boost Pressures
• Adjustable Spring Tension / Holds Up To 30 PSI Boost Pressure Package Included:
• 1 X Maicson Blow Off  Valve Kit
• Hardware As Shown
• Draw In Surrounding Air And Release A Unique Discharge Sound
• Hardened Valve For Increased Durability
• High-Quality Diaphragm And Short Stroke Significantly Increase Response

COLORS: BLUE / BLACK / RED . incl same color vacuum tube