Lowdoller Motorsports 4 Bar MAP Sensor (-1 to +3 Bar Map Sensor) PN: 899004 / -14.7 PSI to + 43.5 PSI Absolute pressure sensor. -14.7 PSI = 0.5 Volts, 0 PSI = 1.46 Volts, 43.5 PSI = 4.5 Volts. Outputs 0.5V to 4.5V. Input 5V. Accuracy 0.5% of full scale. Heavy-duty Stainless-steel body. 1/8" NPT thread. Includes GT150 Packard connector with pins, and grommets. (Pre-wired cable sold separately.) Compatible with all EFI and data logging systems. 4 Bar map sensor.