I've Replaced mine with parts from Auto Zone everything fit and I used clamps. No need for a welder. But I did cut the old tail pipe with a sawsall to get it out. Use the old bracket on the front of the Cat. That's just a gasket and 4 bolts. NO BIG DEAL! Do it yourself. The only place that may give you trouble is the fresh air port on the side of the cat. Mine is smashed closed and not used. Good Luck