Dorman makes a replacement, but not sure I trust it...or even how to install it. (Heat the manifold, freeze the pipe maybe?)

Should I just tap it and replace with a barb nipple, or go for the replacement pipe? Ughhh. One thing after another, once I started pulling the manifolds.

 

Tap it.

 

got the old piece out and found a new pipe to press in...gonna try that with some RTV or JB weld first...tap if that doesn't work out.

 

drink heavily!