2010 Mazda 6 Exhaust system

I would check into borla, magnaflow or flowmaster. I think they all make kits for the 6.

Here is an exploded view of the exhaust system and how to remove it so you can install the aftermarket system of your choice. I would start by spraying down the exhaust nuts and bolts with WD40 and letting them sit overnight before you begin. Check out the images (below). Let us know if you need anything else.