im in a decision for a new catback, its for a 03 GT 5-spd, i have bbk longtubes and a offroad h-pipe, iv been to mustang exhaust and read all about the flowmaster guys slammin the magnaflow guys and vice versa. im looking at both kinds and now i need some opinions, im lookin at the flowmaster delta flow 40 series or the magnaflow catback, im lookin for a nice deep sound and i know thats what the flows got but what about the magnaflows, do they have a deep tone to them also. all information will be helpful. thanks