Just thought this might help some one needing newer cats. Pretty sure there are fittings more suitable but, it's what Home Depot had at 9:30 at night. For those that don't know, the O2 bung size is different on the D2.








Red permanent thread loc on internal threads.

 

Really? The Metric thread pitch is close enough to use standard pipe threads on????

 

Everything fit good and tight. Only thing that concerned me was pulling the brass threads when attaching to down pipe but all tightened up good.