Where's the best place to get the o2 bungs to weld into a homemade downpipe for wideband and stock o2? I believe they're both 18 mm.. and where can I get a bolt that fits in when I'm done with the wideband? I've looked around at hardware stores and no one seems to carry them that big!

 

contact tony1 from here .. he has them at there shop thats where i get it from as well.

 

K&N makes them, you know, the filter guys. or maybe hack up an old OEM header.

 

Take your o2 sensor to Pep Boys/NAPA and find a nut that fits. Grind a little radius on it and weld it on. Local fastener shops will have it too.

 

I've got plenty of K&N ones to sell, but shipping is going to cost more than the bungs. I remember somebody posting that a spark plug extension ( or something like that ) would work and be cheaper.

 

i don't think pep boys has 18mm nuts.. i couldn't find a hardware store that even had them

 

http://www.aces.edu/~gparmer/efi/tem.../slide0007.htm

 

Oh yeah non-fouler, thats what it was. I knew it was a spark plug something but couldn't quite remember. Good info.

 

I used to use those non foulers back in the day!

 

i bought mine from summit, they were from 5-13 each, i bought the cheapest ones cause i had to buy other stuff to, buut just get a nut from home depot

 

18mm spark plug non fouler works well for those of you who will be using an auxilery O2 sensor occasionally, as they come in pairs. Just weld the end up, and you then have a plug for the bung as well.

 

Local muffler shop.

 

Local Muffler Shop.

 

that cheap stuff is all good, but How are you going to weld it? or What is compatible with stainless?

 

You can weld the cheap stuff to stainless with no problem. Stainless welds just fine to most steels. You can't weld aluminum to steel though.