This panel is from rksport.com
They are 5/16" stainless button head bolts. I used 3 drill bits to work up to that.
I put a washer & nut on the back. If I change my plate I can reach thru the taillights for the nut.

 

Looks awesome.
What size tires do you have on the back? Also what Mufflers?

 

Tires are 315/35/20 Nitto Motivo's. They are a great street tire that lasts. Not a drag tire at all. They are mounted on Shelby CS-1's in hyper silver.
Mufflers are GT-500. I used VHT flat black on them. With no resonators thanks to Borla pipes it sounds great to me.

 

Got it installed today and it wasn't a hard mod. I did have to pull the tails to get the outer tabs on the clips to release. Took plenty of pics during if anyone wants to see them.

 

Looks good!

Can you post the entire back end picture so I can see the whole back.

 

Your car ROCKS. It looks Fantastic. Do you have any rubbing issues? What did you use to lower the car?

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Here u go.