I have the llt solo setup but I did an IPF SC at the same time so I can't tell you if there was a difference. I can tell you going solo front to back with high flo cats made the install a breeze ! A significant savings in weight also. The guys at solo are really helpful.
I have a friend with the magnaflow and he does have a slight drone. He is installing custom j pipes soon. His wife drove in mine and told him to fix the drone.
I do have to say the magnaflow is a great sounding system also !
1st IPF Supercharged
2011 2LT/RS RJT Convertible