Bridgestone had a rather nice racing model of the BMW Z4 M coupé on display at Circuit of the Americas last weekend. I gather that this one is specially customised but, if you want a racing spec Z4, you can get one from BMW for a mere $393,000 (plus the cost of the car that they modify, of course).
For the technically inclined...
The red rim pops out really well. A great one for this car from Deutschland!