Creative ideas to space the muffler from my tow hitch?
 

I think due to my other exhaust mods the muffler was shifted back slightly and is making contact with my tow hitch. I was wondering if anyone had an idea of something I could lodge in between to dampen the vibration and reduce the cabin drone I'm getting? Obviously something that won't catch on fire.

http://i.imgur.com/y55slAX.jpg

use some DEI header wrap. Or some stick on thermal insulation. Both available from summit racing.