What Z Muffler Is This on Ebay

[Just-Tri-It]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=130343399875&viewitem=&sspagename=STRK%3AMEWAX%3AIT


Don't recall ever seeing this muffler on a Z. Has anyone else?
Thanks