Boost Control Solenoid Valve BCS Genuine MAC 35A-AAA-DDBA-1BA, Turbo PWM EMS ECU - Brand: MAC - Part number: 35A-AAA-DDBA-1BA - Type: 3 port solenoid - this is the most common method to control boost. - 12 volts 5.4 watts, 25.4 ohm coil (measured), .45 Amps @ 12 volts - Full vacuum to 120 psi capable. - 10-40 hz (ECU determines the frequency).