Wanted!! Muffler ideas.

How big are the magnaflow? I only have about 7'' between frame tie and pinchweld.I thught about purple hornies but I just didnt think they would quiet it down enough.I think I can get some tailpipes on but the only bad thing is I cant get under the car behind the front tire but I think I can in front of rear tire so you will see the 3'' down the under side of the car.But I dont think I have to many options.I'll see tomorrow. Thanks guys