Not sure which 2009 Ford F-150 Performance Mufflers are right for you? We have over 12525 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Mark M from Ada, OK said, "Had my Flowmaster 40 Series Delta Flow installed at a local muffler shop and what a difference!! I used my stock exhaust pipe and reconnected the stock tailpipe as well and am not diappointed. It took just a bit to get used to the markedly increase exhaust note but it sounds great! Very deep tone with just a slight amount of interior resonance around 2000rpm."