Well if you are replaceing just the cat and leaving the rest of your exaust, yes any muffler shop can do it. And you don't have to worry about your o2 sensor. now if you want a test pipe race dump, you might want to check with your header manufacturer and see if they make one. I do now JG/Edelbrock makes a racing B pipe that has a spot for your o2 sensor but it only works with the JG/Edelbrock header.