Unlike mechanically derived products this kit has been created to symbiotically utilise the vehicle manufacturers latest innovations in order to allow the installation of an atmospheric dump valve to the VAG diesel engine. Information harnessed direct from your engine management system is interpreted by the supplied Electronic Valve control Unit (VCU) in order to optimise the activation of the twin piston valve. For ease of installation we have also created vehicle specific fitting kits that utilise silicone boost hoses. which can withstand the greater temperatures and pressures associated with performance engines. along with an additional wiring harness. fixing brackets. vacuum line solenoid valve and fitting instructions.