Pair 80mm stainless steel quick-release clamps for megaphones-to-muffler joints as used on 911R/ST/RSR exhaust:
http://farm4.static.flickr.com/3396/...707f1357_b.jpg
http://farm4.static.flickr.com/3415/...8f05f9336a.jpg
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This is where they fit:
http://farm5.static.flickr.com/4029/...203a1c5f5e.jpg
$100 including shipping - SOLD !!!
Email: andyjboy@hotmail.com
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