Muffler Cutter Set (Left and Right) I used these as a temporary fix because the aftermarket muffler hadn't arrived yet and there was a hole. The car hasn't been driven much for about two weeks. There is some looseness. Installation requires cutting only the downward-facing part of the original muffler. It can be easily cut with a hacksaw for metal. The muffler cutter + extension pipe + strong band are all made of stainless steel. The muffler cutter and extension pipe have slits (cuts) for fall prevention and tightening. The outer diameter of the muffler is 90mm. The aftermarket muffler is 100mm, but the 90mm looks better balanced! Installation is at your own risk. The second image is a comparison with the EXART stainless steel tail muffler.