greddy turbo different between d16 n b18c

Jaydan here u can compare greddy turbo d16 n gsr, exhaust turbo bolts are different D16 Td04H m8 1.25 35mm, gsr Td05H- 18G, elbow won't fit each other, downpipe will bolt up to each except to cat flange, u can swap out the turbo, u can swap manifold they'll bolt up to each other, don't forget new gaskets, new heavy duty bolts.