Seller notes

O2STEPPED x5 Pack Mild Steel O2 Oxygen Sensor Step Style Bung Port Boss Nut Fitting 18mm Listing is for five (5) items. Dimensions: 18mm Stepped O2 PortLarge Outside Diameter: 1"Small Outside Diameter: 13/16" (.8125")Inside Diameter: 18mm ThreadedLarge Diameter Height: 1/4" (.25")Small Diameter Height: 5/16" (.3125")Overall Height: 9/16" (.5625")M18x1.5Material: Mild Steel DISCLAIMER!!We cannot be responsible for improper fitment. It is standard for most vehicles to use 18mm ports/plugs, however...

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