What size exhaust pipe? Dakota manifold p/n's?

The dakota has a 2 inch pipe coming off of the manifolds. There are the same exhaust manifolds on 1990-92 that are 2.25 outlets
Are they exactly 2 inch when you measure them with a caliper on the outer diameter? I put my calipers on and got about 1.875. Of course the pipe bends right there so the diameter could be skewed