A vibration/rattle has developed on the left side of my dash. It seems to be comming from the area under the headlight switch. It is only at low RPM's or in reverse. It developed as soon as I installed a SuperSprint Exhaust. I figured the low resonance exhaust is making sonething in there vibrate but I cant even get under the dash to check it out. I am having a hard time removing the access panel under the steerign wheel to get up in there. I am afraid to pull my dash pod out to look but it seems like noise is coming from that area. Very annoying!! Thanks in advance to all responses.