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.