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The Prosport Wideband Air Fuel Ratio Gauge comes in the 52MM size, and has a dual color display in red and blue. This wideband O2 gauge also utilizes the 5 wire heated LSU 4.9 Bosch sensor, and can read from 10:0:1 to 20:0:1.
This is a complete gauge that comes with the Bosch 4.9 5 wire heated O2 sensor, a weld in bung, the wiring harness, gauge visor, and instructions for installation. Also this gauge has a 0-5 volt output signal for data logging.