My new to me 2006 MCS has a bit of an exhaust rattle. Usually notice it getting on or off gas at low speeds. I recently had Best Motor Werks do an inspection of my car and they said the rattle was from the front header pipe & rear muffler, both noises coming from inside the exhaust. Estimated over $2,000 to fix. Said they could fix it with OEM parts or I could buy aftermarket and they would install. Didn't get into many details because there were other issues that came up in the inspection that I was more concerned about at the time. Anyways...my knowledge of exhausts is very limited. What would you recommend I do? Should I take it to a exhaust shop to have them look at it? If so, any recommendations?