This is a standard weld-on exhaust flare.
lip edge dimension is 5.75" OD
degree of lip is 20 degree
tube end dimension is 5" ID
length is 3"
Fits Cummins, Cat, others. Slips over a 5" pipe or elbow and is welded in place. Matches up to your turbo.
Note: There are many sizes and types of exhaust flanges.