From Their Website:
Walker Product Walker Products - AutoPartsWarehouse.com
"OXYGEN SENSOR, 4 WIRE, DIRECT FIT REPLACEMENT PART, BEFORE CATALYTIC CONVERTER -- Improve Your Cars Engine Response, Gas Mileage And Lower Its Emissions When You Replace Its Tired Old Oxygen Sensor, Exceeds OEM Specifications And Test Requirements, Original Equipment Part # 8946509240"
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