jasonkim370z

seriously having trouble finding the rattle on my 370z, ive used hose clamps to tighten up exhaust hangers so it doesn't hit the crossmember but still hearing a nasty rattle coming from the rear of the car, checked spare tire area for loose items, Kind of sounds like glass rattling or plastic???? Any suggestions? Usually happens most pronounced at 80km/h or 50mph in 6th gear? also at 5th both at about 2-3000 rpm? sometimes happens at about the same rpm in 1st and 2nd gear.