Need some feedback on which system been reading a lot but actual users tell a lot more.
Have a 2004 Dodge Durango 5.7 Hemi

 

I have dual Magnaflow on mine. You can check out the pics in the post below. I love the way it sounds. It has a nice low growl but really lets loose when you floor it.

 

I just put an aero at2525 muffler on ours. I really like the way it sounds. For performance gains, i would recommend going to a 3" exhaust. I just replaced the muffler and while it helped, I think redoing the entire exhaust in 3" would have helped even more.