Audi TT GT4

As awesome and impressive the GT1 race cars are, they are typically based on cars most mere mortals could never afford. Except for perhaps the Nissan GT-R and the former Corvette models, most GT1 race cars are based on vehicles that in production form feature pricetags that can run into the hundreds of thousands of dollars. The tamer GT4 race series, however, offers race fans something a little more attainable. Just last week we saw Aston Martin unveil its 2011 V8 Vantage GT4 race car, and before that there was the Lotus Evora Cup, and now Audi has joined the fray with a concept of a GT4 race...