For Sale Racing Beat Exhaust for Mazda CX-5 GT 2017

Soon to be 2.5T CX-5
Which carrier is most cost effective shipping this muffler?

I think actual truck freight through an LTL carrier like R&L Carriers, Central Transport, etc would be cheaper than boxing it up and sending it UPS or FedEx. Heck, even their freight services would probably be cheaper on a pallet than in a box.
Mazda 6 iTouring 6MT
can anyone confirm the RB cx-5 axle back and mazda 6 axle back are interchangeable? I read on one of the forums that it is but I cant seem to find that post again.