BOV boost pressure relief valve AMAZING SOUND EFFECT !!! It protects your turbo !!! Valve with partial or complete bleeding of air to atmosphere. The valve is suitable for vehicles equipped with the standard DV valve. Thanks to the partial return of air to the system, it will not cause computer errors and problems with "overflow" of the engine during gear changes. The serial DV valve forces the air into the circulation, while the Blow Off valve - the atmospheric valve lets the air out, which protects your turbo, and at the same time produces an amazing sound effect - characteristic PSSSSSTT !!!! The valve is entirely made in CNC technology from 6061 aluminum alloy. The set includes: Pressure relief valve V-Band clamp V-Band mounting flange High-strength O-Ring seal Vacuum connection Boost pressure relief valve BOV AMAZING SOUND EFFECT !!! Protects your turbo !! ! Valve with partial or full air bleeding to atmosphere. The valve is suitable for vehicles equipped with the serial DV valve. Thanks to the partial return of air to the system, it will not cause computer errors and problems with "overflow" of the engine during gear changes. The series DV valve forces the air into the circulation, while the Blow Off valve - the atmospheric valve lets the air out, which protects your turbo, and by the way it produces an amazing sound effect - characteristic PSSSSSTT !!!! The valve is entirely made in CNC technology from aluminum alloy 6061. The set includes: Pressure relief valve V-Clamp mounting flange V-Band O-ring seal with increased strength Vacuum connection