What size bolt to plug EGR valve?

Here is the part number from napa of the drain plug I used. Its the correct size and pitch (22x1.5) straight threads with a washer. Worked perfectly.

704-1048

Good Luck All!

*EDIT* Use 2 washers. It bottoms out just a hair shy before the washer hits
 
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Can you just take off all the egr piping or do you have to do something else so it doesn't throw a Cell?
 

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