I have a 05 GT and want to make it sound like a true mustang. Is the new 05 mustang flowmaster axel back as loud as the 40series delta flow. I heard many mustangs with the 40s and it sounds awesome. What mufflers are on the axel back I know the mufflers on the axel back were specifically designed for the 2005 mustang but are they 40series. I want to know if i should get the axel back or get a custom 40series exhaust. I am also going to put a bassani x pipe w/o cats. Either way i am staying with flowmaster b/c of the sound of them on a mustang.