Just drove a new 07 612 with the GTS (not GTC) pkg (ie no CC brakes) - the sport exhaust was incredible! Just delicious on downshifts! Absolutely addictive. Does anyone know how close a Tubi exhaust on an 05 612 would come to the sound of a newer 612 with the GTS pkg? Would it come pretty close? Would it be even better? Has anyone heard both?