Bought this muffler to replace the stock, rusty muffler on my 2003 Lexus GX470. It didn't screw in directly as the factory muffler is longer, but with a little extra straight pipe it did weld in well. I was hoping for a near factory sound and this is a little louder than the stock muffler but has a nice tone. It idles well, but when accelerating it's a bit noisy, not loud at all. Even at freeway speeds it makes no noise. Can't comment on durability yet as I've only been using it for a fewβ¦