Here are photo looking under the car from the rear. You probably loose a good 3” and make sure you go over speed bumps with both rear tires together.

 

I also have the mina under axle system on my XKR and also love it. However it seems to have more ground clearance than is apparent in your pics.

 

I bought a set of pipes to delete the rear mufflers, from a guy on this forum. He didn't care for the drone. So I have the center muffler and the axle mufflers, but just pipes after that.

It is louder and growlier, on startup and when you get 2500+ rpm. But at highway speed ~1800-2200 rpm, it does drone a bit. It's not horrible, but it is there.

I'm looking to add more growl. Gf has Harleys and likes the brap. I just want it loud when you start it up, and when you put your foot into it.

 

I just measured my clearance under the Mina exhaust and I have 4-1/4” of clearance. That is more than I expected and more than it looks.