Header insulation

[michael glidewell]

I'd like too insulate my exhaust header down to the O2 sensor so it won't
cool off and get better gas mileage( that's my theory anyway) Does annyone
have a simple recommendation for something effective? I've thoght of the
asbestos muffler wrap stuff but I don't think it will retain the heat in
very well. This for an 81 528i BMW.
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Michael Glidewell       Boston, Massachusetts	glide at shore.net
KE1CP     BMW 528i      BMWCCA 		http://www.shore.net/~glide/