Color: black and blue Turbo vacuum tube Function: pressure regulating valve, adjust air pressure, improve engine performance, reduce fuel consumption why to install a turbine regulator? There was a supercharger exhaust pressure release valve, when the pressure reaches a certain pressure relief valve opens to reduce eddy speed protection engine booster limit value this thing is to make the exhaust pressure relief valve to open later increase pressurization value low to reduce reduce turbocharged turbo lag and can shift to an earlier date within the speed range would improve response speed 900 RPM low creep, reduce exhaust door faster for turbo, gating system can be faster speed product function: when driving can choose high and low pressure, high and low pressure set fully adjustable. The booster controller allows an increase of approximately 210% over the internal exhaust door setting and 110% over the external exhaust door setting. An effective and simple way to control the boost level and generate more power from the engine. The supercharging controller is a manual supercharging control system, which controls the supercharging pressure level by using the pneumatic control valve bearing.