Utilizing a 4.9 0258017025 LSU sensor. WHY YOU NEED ONE AFR Bosch4.9 LSU wideband sensor and weld-in bung included. Gauge Display/0-5V Output Gasoline values from 10:1 to 20:1 AFR. 0-5V Output E85 values from 6.6 to 13.2:1 AFR.
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