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Earls Oxygen Sensor Weld Fitting (Weld Bung) - Stainless Steel

Oxygen Sensor Weld Fitting (Weld Bung) - Stainless Steel


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Estimated shipping date: 11/13/2020
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Earl's O2 Sensor Weld Fittings are the ideal way to add a sensor when converting to EFI or adding a wideband Air/Fuel gauge for tuning carbureted engines. The weld fittings are available in steel or stainless steel to match your exhaust system. The thread size is 18mm x 1.5 and fit most OEM and aftermarket O2 sensors (GM, Ford, Chrysler & most import vehicles). Features are recessed step for easy installation by drilling a hole in the exhaust system and welding the fitting in place. Sold individually


  • Fits Most O2 Sensors - GM, Ford, Chrysler & Most Import vehicles
  • Thread Size: 18mm x 1.5
  • Choose from Steel or Stainless Steel Material
  • Ideal for Converting to EFI or Adding an O2 Sensor for Wide Band Air/Fuel Gauges
  • Requires Welding


Adapter TypeOxygen Sensor
Emission Code5
MaterialStainless Steel
Product TypeOxygen Sensor O2 bung
Thread Size18mm x 1.5
Type of ComponentOxygen Sensor Bung
Part NumberSSOXY018ERL



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Requires welding and a hole to be drilled into the exhaust. Oxygen sensors need to be mounted with the tip pointed on a downward angle. A minimum of 10 degrees from horizontal and 15 degrees from perpendicular is recommended.
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