Audi will sell you a Grand-Am-ready R8 LMS, and offer support through its Audi Sport customer racing group. The R8 LMS will make its U.S. debut at the 50th anniversary of the 24 Hours of Daytona.

Ingolstadt, November 17, 2011 – In 2012, the Audi R8 LMS ultra will succeed the successful R8 LMS GT3 sports car with which R8 LMS customers have won 115 races and 12 national and international ...

And if you feel like spending some more, you can even buy the LMS-spec race car for what it's worth. The drag race you're about to see here has lined up multiple variations of the R8.