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Return to Parts List Category : B- Small Block Dodge Magnum : Computers, Programmers & Sensors MSD 23121 MAP SENSORS 2 BAR 2 PSI - 30 PSI BOSCH STYLE FOR TURBO CHARGED ENGINES W/ MSD CONTROLS $122.95 Bosch Style For Turbo Charged Engines W/ MSD Controls MAP Sensor, 2-Bar, For blown or turbo applications up to 20 lbs of boost Compact Model  The pressure inside the intake manifold is an extremely important input to the ECU. This Sensor will respond to changes in manifold pressures and relay the information to the ECU in the form of a voltage signal ranging from about 1 volt to 5 volts. Several different versions are available for normal aspirated and engines with blowers.