I doubt if the detroit Big 3 have it either. Vette still has OHV, for Chrissake! Ford GT probably will leak from whichever holes, and they can only build 3 of them next year.
The real supercar battle will be fought over by the Germans and Japanese. I'm very interested in that super beautiful SLR. The Italian makes, including Ferrari, may be foreign owned before too long, just like the British.
For now, the Japanese do not seem at all interested in putting super engines in their sedans, undoubtedly because their premium makes are not well established like the Germans. But that will probably change in the future.