I just got my aFe stage 2 intake installed and im not sure if that is what im hearing.
If i gun it and then let off the throttle fairly quickly most of the time it makes a fluttery thumping sounds like its coming from the front left side of the truck.
got my tune and great on power. For everyday driving the shifting seems a little weird but not bad just jumpy. The only thing is it is killing my mpg. I was at 19 mpg now 12mpg. for sct extreme to slr+