I installed a single American Thunder exhaust on my 07 V6. It sounds great.
Here is my concern. Please see photo 1. My AT exhaust came with 3 hanger mounts not 2 as shown on flowmasters website (photo 3). My stock exhaust comes with 3 as well. I was able to remove 2 of the hanger mounts successfully on the stock muffler and placed it on the AT exhaust without any problems. The hanger mount near the axle pipe doesn't seem to wedge its way out. See photo 2 where I arrowed the hanger mount I'm referring to. Therefore, my AT exhaust is installed with 2 of the 3 hanger mounts. How can I detach the final hanger mount from the stock muffler so that I can install it on my AT exhaust without damaging the stock muffler? Has anyone else had this problem?

Would like as much input as possible.
Thanks in advance!

 

I put the AT's on my GT this week and there were only 2 hangers per muffler. I don't know where you got the third one. Different on the 6'ers?

 

A bit OT but:

I noticed from your pic you are using the clamp that came with the Flowmaster.

TAKE IT OFF NOW AND THROW IT AWAY. Go get a "saddle" clamp from your local auto parts store and use that instead. Trust me on this!!!

 

The 3rd on the V6 muffler isn't really a hanger, it some kind of rubber balancer, you should'nt need to mess with it when you put the replacement muffler on. I replaced my stock V6 exhaust with a single GT take off and i did'nt bother with the 3rd one.