So I just got a cobbtuning rear sway bar installed/Front cusco swaybar along with whiteline endlinks. No particular sounds except when I put the car in reverse it sounds like the front bar is rubbing or vibrating. All bolts are tighten down and bushings are greased...its only been 3 days. So i am assuming I have to let it settle in....but just like to know some feedback if anyone actually had this problem. Like I said there's no other noises over turns, bumps or anything just when I put the car into reverse and give it moderately a good amount of gas you can hear a rubbing sound.

Thanks in advance,
Calvin