Does anyone know of or fabbed something up to fill the empty side of the bumper after going to single exhaust? Single is better in all ways IMO except having the ugly hole..

If someone has any info I would really appreciate it, Thanks

Looks like deedub used mesh or something, maybe PM him and ask.

I planned on filling it with simple black painted mesh but have actually grown to like the 'empty' look. Gives that area a very performance/purposeful look imo

I have the RB exhaust so I was looking for a filler myself. I ended up getting some black mesh from Lowe's and some double sided tape and put several layers on cris-crossing so you couldn't see through. It's only noticeable if you are right up on it, otherwise they look like black holes. I got underneath the car and taped the mesh to the back part of the bumper where you can't see it. The mesh was some sort of stuff to keep junk out of gutters on houses it was real flexible and easy to cut and has stood up to the heat of the exhaust without issue. This isn't the greatest picture, I get my new camera next week so maybe I can get some better shots up.

you might try this thread:

http://www.rx8club.com/showthread.php?t=138405&page=6

check out nemesis8's car. that thing is sick from the back.