ARKSEN Large Tail Pipe Expander Exhaust Muffler 2-1/8" to 3-1/2" Ideal for auto muffler tail pipes or other motor exhaust pipes 2-1/8" to 3-1/2" pipes that need to be reshape Simply insert and turn with wrench Heavy duty pipe expander reshapes, enlarge muffler ends or pipes warped by heat and dented by clamps Perfect for exhaust system repair and installation Fits all pipes from 2-1/8" to 3-1/2"