Muffler And Pipe Expansion Tool Simply Insert Tool And Turn With Wrench.;tool Does The Rest Choose From 2 Sizes Easily Restore Round Shape In Seconds Reshapes Muffler Ends And Pipes Warped By Heat And Dented By Clamps. Makes It Easy To Fit New Tailpipe Or Exhaust Pipe. For 1-5/8" Through 2-1/4"id Pipes Or 1-1/16" Through 1-5/8"id Pipes (i...