Magnaflow catted x-pipe and FRPP cat-back installed. Removed magnapacks because of too much interior drone. I have a fluttering / ticking sound coming from the drivers side. Sounds like it could be from the header connection to the x-pipe. Sounds similar to detination also! I can hear it pretty well when the car is cold and the windows are up and it quiets down as it gets warmer but never goes completely away. RPMs when noise is heard = 2000 - 2500. What are your opinions?