I have 2 PAIR block-off plates for the Pulsed Secondary AIR (PAIR) system used on late model GS500s. I think it was 2007 2008 and 2009. One side says "BUSA", the other side is blank. They are Aluminum.
Selling for $5 plus a little for shipping from Cincinnati OH.
Here's a picture: http://www.flickr.com/photos/77567361@N05/7013902169/in/photostream/
PM if interested.
Dibs ;)
bahh ya beat me to it..
Sold to Mr. Adidasguy. Thanks for yor interest!