I have Magnaflow on my Cuda, currently 2.5", the mufflers are straight through but its got a very nice rumble, no drone but also quiet which I like, If I stand on it it barks a little, I'll be changing it out to a 3" once the 408 heavy breather goes in.
Ive also installed MF systems on Chev Nova's and like them, built out of thick wall tube, made well, wait till YearOne has a 30% off sale and get them.