From Lem: "50-55" photo is the exhaust bending card from the manifold to the muffler; "51-55" photo is for the tail piece.
Exhaust Bending cards Copyright Huth Manufacturing.
Lem, thank you for sharing these cards & going to the effort to get the pictures. Send thanks to the shop owner as well. If you prefer I remove the photographs from the "Uncle Brad" share folder linked above, just let me know.
Brad