yeah i ordered a magnaflow, and my exhaust guy told me to go with an offset inlet, center outlet. you might want to do the same.

magnaflow mufflers are uni-directional flow, so make sure you get the inlet offset, not outlet.

 

i already ordered a magnaflow muffler with a tip for the end. i'm looking at these options as a second muffler inline aka resonator to quiet it down more...