I have found over the years that you stay FAR away from the big name muffler shops. Case in point my 95 C1500 needed a muffler and I wanted a sportier sound with dual tailpipes. Midas quoted me $875.00 from behind the cat back. We have several muffler shops within half hour that are Mom and Pop type operated run by Mexican Americans. They did the system on the 95 for $200 and he scratch built the system and the splitter. Yesterday I had the closer shop build me a tailpipe for my Task Force truck as I wanted to duplicate the factory pipe that crosses over the rear axle to the passenger side and turns down at the end.
Since Im in the business too I use them whenever I have an exhaust that needs work and they have always been careful and respectful. Dont be afraid to shop around nor to tell them your fears but stay clear of the big name production shops.