i been having this problem for a month now and i dont know what to do so i figured to ask question from you guys.
i installed a catback exhaust in my car and as for me i like big and loud exhaust.by the way its greddy the one i installed in my car.well everytime i drive my car around the exhaust vibrate so much that it affected something on my trunk and making that loud noise i thought it was my rear bumper so i took it out but it wasnt.this loud noise makes everytime it hit 2500 rpm.it sounded like two metal sheet touching together.anybody knows what is that????