Not very satisfied! I had a short 1-inlet, 2-outlet Dynomax turbo muffler on my GMC Sierra 07 that I just bought and wanted something quieter so I did my homework and found this Flowmaster that claimed to be pretty much as quiet like the standard, NO! It's now almost as loud as the Dynomax, and the drone hurts when I tow my van. I called Flowmaster to discuss the noise level and why they claim it's almost identical to stock and all I got from SA on the phone is that this is our quietest muffler. Sorry, there's nothing we can do, go back to default. So I just spent $225 on a silencer and a setup I can't stand!