Caught the X6M testing at the PC Track here in SC.The X6M looks stock except for the huge front air intakes w/ the white LED's and the rear fascia to house those quad exhaust.This engine sounded very much like a V10/V12 powerplant.Very high pitch exhaust note...not like the TTV8 in the 50i X6....the 50i X6 engine has the NASCAR,booming,roar.The X6M sounded very different to me than the 50i X6.I guess time will tell on the engine.Thanks! PalBay http://palbay.smugmug.com/gallery/5763560_adiyz/1/356439066_wXPBz