Copper exhaust manifold gasket

[manny1973]

What are the thoughts on this copper exhaust gasket? What would be the advantages over a standard exhaust gasket?

http://www.ebay.com/itm/310205601801?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

[Kurbycar32]

On a turbo motor its significantly stronger than a conventional paper/metallic gasket and resists blowing. For a NA motor i cant see any advantages except it might last forever

[Wade Nelson]

Copper also conducts heat better, and the more heat you can keep in the exhaust stream the better the turbo performs, since heat = energy. The manifold might get a bit hotter as a result of using a copper gasket, thus keeping the stream a tad warmer.