Review on Flowmaster 2.5 Inch Inlet/Outlet 50 Series DF Muffler by Corey Holloway

build quality and finish are typical Flow Master and definitely five stars. However, I was very disappointed when I installed it on my 1996 F150 5.0. it sounds a hair's breadth from the stock muffler that I removed and replaced. To be honest if I had installed it myself before the master and went to that truck I would have thought it was a stock exhaust. The description says minimal interior noise and moderate exterior noise, it's more like having a supply. After talking to a few people and reading some more on the internet I found out that it mainly depends on what engine you are running, what pipe diameter you have, how many catalytic converters you have and how many pipes you have from the headers to the exhaust . Therefore, you need to find out for your car and not be guided by the Flowmaster audio description. I can tell you about a long cab F150 Reg with a 5.0 V8 engine and two factory catalytic converters. Sounds like stock!