i purchased flanges that fit from cole muffler (independent shops all around here ) but you can buy flanges out of most exhaust catalogs , such as N A P A etc. you have to find a counterman that knows how to read a catalog or walk and chew gum to get help though. regards, tim colson C N Y C C _www.cnycorvair.com_ (http://www.cnycorvair.com)