Electronic blow off valve for Turbo Diesel Car The diesel dump valve is electronically controlled to allow it to work correctly just like on a petrol, only they are usually louder as Turbo diesels typically run higher boost pressures Notes: This blow off valve eliminate excessive back pressure when you change gears. The pressure created when the throttle is closed during gear changes or deceleration can damage your turbo, because turbo cavitation event. The life of your turbocharger will be improved with this kit. You will more torque and response from your turbo between gearshifts and lower RPM. Digitech Gen 2 Dump Valve Control Module Gen 2 Vacuum Control Solenoid Solid Aluminium Piston Dump Valve (Serviceable) Dump Valve Adjustment Shims Dump Aluminium Intake Connection Silicone Vacuum Hose Plug & Play Wiring Loom Full colour Installation Instructions