I have recently installed my Brenspeed 93 tune and JLT Intake. Ive noticed that when I rev the motor past 3,000 in neutral, I hear a popping sound from the exhaust or a small backfire sound..Everything else onthe GT is factory.. Is this normal ?????? any help would be appreciated

 

You just noticed now?? Quite normal for our cars!! Does it with factory tune also!

 

Ok thanks...And ya I just noticed it