O2 sensor port plug

[cldonley]

I have a two into one exhaust I picked up from a member that has an O2 sensor port I need to plug. Anyone have a size for that? Thx in advance!

 

[sanndmann3]

18mm x 1.5 is my guess...

 

[cldonley]

Sounds like a good guess...

 

[Broncobowsher]

M18x1.5 is the standard O2 thread. Same as an old gasket seat spark plug. Yes, spark plugs can be used to plug the port. Also many oil drain/fill plugs are also the same size. I have a motorcycle drain plug that size on the transmission of my Xterra (let me add an oil temp gauge).

 

[cldonley]

Thanks Bowsher!