"ASE" Certified yeah right no such thing with advance muffler!!! nothing but shade tree mechanics. Oh and by the way if your a business you can expect to pay more they have 2 different sets of prices and if your converter gets stolen they charge you the cost of a dealership with out the warranty and they still use after market converters not oem. Example your dodge truck has the converter stolen normal would cost approx $300.00 to replace, they would charge you the cost of the dealership that would be approx $900.00. The dealership convert would come with pipe and everything but that's how they do business. But check this out if the cost is to much they are more then happy to "knock the tax off" and not charge you any sales tax but I do think that's legal to do so be careful!!!!