For anyone installing exhaust pipes on their engine or wanting to boost
performance I have just listed this exhaust wrap on eBay.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7916786324

Easiest installation is on new pipes before you install them but with some
creative effort it can be wrapped on existing pipes. The silicone spray is
used to seal the wrap and make a moisture barrier in case you run over a
puddle when raining.

William