Review on Universal Exhaust Muffler Tail Pipe Expander Kit, Fits 1-1/8" To 3-1/4" Pipes, 3 Piece Set With Carrying Case - Improve Your Vehicle'S Exhaust System With GZYF! by Charlie Maadhadians

Well. The mid-size expander's threads were destroyed the first time I used it. The large expander still works but I lubricate the crap out of it every time I use it. It does okay for the price. But it's still rather disappointing. The nut used on them is probably too small and it ruins the threads if too much force is applied. Then again, you need a lot of force to expand a piece of pipe. Overall, it worked for my one project. But I don't see them lasting much longer. I'll buy a better set if I need to do this again.