Not sure which route to go... Anyone try the Flowmaster direct fit kit? I had a Magnaflow Catback on my 2014 sport. Seems a waste to take off the whole system but then again seems like a rip off for the direct fit Flowmaster kit. 522 on sale here in Canada vs. 856 for the 15363 Magnaflow Catback. Not sure which route to go....any suggestions?