M50B25 exhaust manifold 3 bolt flange sizing?

[MaxBell]

Hey guys;

Just wanted to double check, the 3 bolt flange at the bottom of the M50 headers is 2" in diameter, right?

[MaxBell]

Yes it is.

[MaxBell]

FYI: It's 2" OUTER DIAMETER!!

[MaxBell]

Ok, thanks helpful R3V community.

[Northern]

rigid pipe/tubing is measured by OD. flex tubing is measured by ID.

Should be true for all automotive or aerospace related lines/fittings.