what size non-fouler would i need for my 04 5.7? i went to jotozone(autozone) and they only had 14mm and 18 mm. im about to do that trick to my down stream o2's. and will the cel go out by itself once i do the trick or do i have to clear it with the scanner

 

dont know what size you need, but you will need to clear the code either with a scanner, or disconnecting the battery for a while.

 

Check out the FAQ, it has a ton of info. Here's just a little light reading for ya.

https://dodgeforum.com/forum/3rd-gen...ving-cats.html

 

Get them to pull an O2 sensor for your truck from stock and match up the size/thread pattern...

 

you need the 18mm and they are 1.5 pitch. So you need the 18mm x 1.5

 

Ive never thought to do this but i read the writeup. So you have to do this to the postcat sensor?