I have magnaflow with Focus central header, ORP on one car, Stock on the other, and a 3" Trubendz with Magnaflow on my SVT Turbo!
My ZX3 witht he magnaflow needs a resonator to quiet it down a bit in my opinion!
2011 F150 FX4 Blue Flame Metallic SuperCREW EcoBoost 371RWHP/458RWTQ
2013 Focus ST3 Performance Blue-Gone
89 Mustang 5.0 Turbo 670 rwhp-Gone
07 Mazdaspeed 6-Gone
03 SVT Focus Turbo 326whp/278wtq-Gone