BOV boost pressure relief valve kit AWESOME SOUND EFFECT !!! Protects your turbo !!! Kit designed for DIESEL engines. Contains: Pressure relief valve with working pressure over 2.5 BAR Solenoid Controller Power cables Vacuum line High quality assembly diameter: 27mm BOV boost pressure relief valve kit. AMAZING SOUND EFFECT !!! Your turbo !!! Kit designed for DIESEL engines. High-quality workmanship. Includes: Relief valve with working pressure over 2.5 BAR Solenoid Controller Power lines Vacuum line