...happened Thursday evening. Was on 64 West in WV, was coasting down to around 60-ish from 80-ishy for a work zone when I started to hear this strange droning noise, would almost make you think of a high-pitched moan or something. Couldn't tell if it was from the rear end or the exhaust, scared the living crap right out of me. Almost replicated it today on 64 East, but it wasn't quite the same sound. Car never hiccuped, never hesitated or acted funny, just that sound. Ever happen to anyone else? As far as engine and exhaust, I'm running stock 6.1 with the exception of an AirRaid intake and BT Catch Can.