Reviewed By Michael B (Memphis, TN) Reviewed for a 2013 Ford F-150 —9/1/2015 6:18 AM
Throaty without being obnoxious, a little drone at lower RPMs - but great at highway speeds. Cool to hear the turbos whine through the exhaust, sounds "diesel-ish"
Reviewed By CUrt C (EAST PEORIA, IL) Reviewed for a 2010 Ford F-150 —8/28/2015 4:07 AM
Purchased the American thunder for my Ford F-150 and love the sound. Haven't been able to keep my foot off of it enough to see if there is an increase in mpg . Have felt a difference in throttle response when towing especially. Not too loud in cab but enough, wouldn't want anything louder.