Flowmaster 14020100 Pro Muffler Aggressive Review

When I tried this product, I was pleasantly surprised by the improved exhaust tone... the deep growl instantly made my vehicle sound more aggressive and sporty. It also increased horsepower and torque performance. However, the installation process was a bit challenging and required professional assistance. Overall, this muffler provided the perfect balance of sound and performance upgrade..

If you are looking for an aggressive sounding muffler that will match or exceed the fuel efficiency of a straight pipe on your diesel truck then this muffler is not for you. The commercials tell you all that, but it's not true. I've ridden this muffler for over 1000 miles, measured MPG after each fill up and have been disappointed every time. My mileage is down 1mpg after my straight pipe was removed and this muffler was professionally installed. Not only that, but the time it takes to spin up…