The blow off valve helps reduce the amount of rebuilds on turbocharger as well as improve acceleration between gears.Features:100% brand new.Helps eliminate compressor surge.Fits for most cars with 50mm intake pipe. Comes with flange adaptor.Professional installation is highly recommended.Specifications:BOV Color: Red， Blue， Purple (Optional)Adaptor Color: SilverMaterial: Aluminum AlloyBOV size: approx. 9.2 * 7.9 * 7.9cm / 3.6 * 3.1 * 3.1inBOV weight: approx. 407g / 14.3ozPackage size: approx. 12 * 11 * 8.2cm / 4.7 * 4.3 * 3.2inPackage weight: approx. 528g / 18.6ozPackage List:1 * Blow Off Valve1 * Flange AdapterNote:This valve is suitable for custom installations only， and cannot be installed on a silicon hose.