I came across a rear muffler bypass for a 928 on eBay )Item number: 250209903158) that looks different than any other RMB I have seen before. Do you any of you know what made this and what year of 928 it may work for?
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=250209903158&ssPageName=STRK:MEWA:IT&ih=015