Description: The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo's compressor from going into surge. 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. Fits factory flange for WRX (MY01 - MY07), STI (MY01 - MY13), Forrester (2005 - 2007) Good quality replacement for your standard BOV Great modification to improve the sound of your vehicle Save time and money with this bolt on BOV compared to most aftermarket units that require adapter plates and flanges etc. Easy to install and adjust yourself at home Aluminum body for strength and durability Specification: Size: 12 x 8 cm / 4.7 x 3.1 inch Material: Aluminum alloy Package Includes: 1 x Blow Off Valve
