Quality Sound, Black Exhaust tips set it off.
Reviewed By Garrett W (HARRISBURG, NC) Reviewed for a 2014 GMC Sierra —11/15/2014 6:11 AM
Alright so everything was a breeze including assembly and installation, and the sound quality is exactly what I wanted. The only concern I have is my 5.3L V8 Sierra has the flex fuel where it kicks down to just 4Cyls. on the Highway or when cruising below a certain RPM. It goes into a deep subtle thudding during the transition from using 8 to 4. I'm pretty sure its just from back pressure, if anyone has an answer for this let me know I'm looking for a solution. Overall fantastic exhaust.
The American Thunder 50 Series HD Flowmaster Exhaust System.
Reviewed By Bobbie S (Albany, OH) Reviewed for a 2015 GMC Sierra —11/6/2014 5:08 AM
A shop that I use often only charged me one hour laber to do the install. Worth every penny because they stand behind their work. The 50 Series has a really deep tone through out all the gears. I do have some drone sound during low speed cruising. I had Corsa on a previous GMC Sierra that the tone came alive when you stepped on the pedel, which was a nice aggressive sound. If you want to always hear a deep tone, the The American Thunder 50 Series HD Flowmaster Exhaust System is it.