Installed on Tundra 4.6 2010. Anyone who owns a Tundra knows that the factory muffler is invisible to the ear. i wanted to say hello This is V8. It came down to either that or the Flowmaster 70 series. Good sound overall. Good idle sound and the guy with the muffler had no trouble installing it. The only downer is the more than acceptable hum at 1800-2000 rpm on medium throttle. Slight incline/hill. boom guy. Maybe episode 70 would be better here.? I still like it partially and fully. would i do it again Eh maybe. I don't travel that much. If I had to drive to work every day and drive a car, I would choose the 70 series.