Excellent replacement for the stock muffler. Just note that some Silverados have a standard muffler with two exits going into the same exhaust pipe. They simply cut off the "Y" and used a small piece of straight pipe between the muffler and the exhaust pipe. It was a pretty cheap muffler compared to other options and well worth it. If you want a standard sound without paying GM $400 for a muffler, this muffler is for you.