I went to Monroe Muffler in Wayne, PA today to get oil change for my 1999 Nissan Altima. After oil change was done, he said I needed new flexpipe with hangers as they were all rusted and held up by some clamps or something. I've been taking my car there on and off for years for oil change, inspection, etc. They said the flexpipe would cost $400 and the labor would be $100. Based on some research I did online today, it looks like the price should be $150-$175. Any opinions out there or where I could go?