Review on Flowmaster 42543 2.5-Inch Inlet & Outlet 40 Series Muffler by Josh Thompson

Overall very happy with this muffler. My F-150 definitely has a more aggressive sound after installation. I expected it to have a deeper, growling sound, especially at idle. It sounds louder but not what I expected, especially from the YouTube videos I watched. Still, it was worth spending a few bucks more for a Flowmaster instead of an OEM spare.