Brian ,
The 2.5” steel tubing came with one end expanded. I went back and forth laying out so to use as little material as possible . The expanded portion was a healthy 3” depth, so I made short rings to go around one tube to change the way the muffler fit .
Previously I worked in a muffler shop with a lift, hydraulic bender and expander etc. , why buy a kit ?
Just ask a shop to expand a pipe or two for you. Some will work with you so I would call around first.
Here in Florida we don’t go through exhaust systems as fast as up north with the sleet/snow and salty roads. These steel tubes are rusting as soon as I took them out of the plastic packing sleeves.
👍Stainless is much better 👍
Dakazman