I went through Napa. Part Number: 704-1048

 

for the stock manifolds? or for the aftermarket headers?

 

For our friends in Canada, part #1016, $1.99, or #1031 for the flush look:

http://www.cgenterprises.com/drain_plugs_metric.htm

 

Stock Manifolds

 

i just ordered from the site you recommended injuneer...thanks for all of you help guys..

 

I welded a screw into the fitting thats already there. Works fine, had to cut the screw down to size however.

 

i put in those bolts and everything is working fine..thanks again guys for the help...any other near free mods that i can do? (low on funds b/c i'm paying for a wedding right now)

 

What size plug is needed for mac headers?

 

m22

 

As Toby said M22 fits MAC headers. I found the oil drain plug for the Dodge Cummings Diesel at AutoZone. AutoZone number 090-151.1 It fits really well, has a washer and it has a drive hole in the head that a 3/8's rachet fits for installation. It's also nice and shiny to match the headers.