Yep I have seen something similar.
Its a teflon gasket . I had a thread going a litle while ago in regards to sealing my inlet manifold with the amount of boost i run and came across this.
http://cgi.ebay.com/ebaymotors/ws/eB...8514538&rd=1,1
Here is the link to the thread too.
http://toymods.net/forums/archive/in...p/t-17853.html
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