Originally Posted by kawasaki00
They do not need to be welded back on, just get some different clamps, the make some for od/od clamping.
Don't think this is possible due to how close the cut needs to be made to the cats. There won’t be enough straight tube length left to clamp onto properly. You might be able to make it work with a jenky narrow clamp, but be prepared for the ensuing leaks.