In 2009 the factory backed racing effort chose to step down into the GT2 category in order to compete with the same cars on the track that the production model competes with in showrooms.
The Corvette race cars are powered by 6.0 litre GM small block that is based on the 7.0 litre LS7R that powered the outgoing GT1 version. The engine output is a relatively conservative 470 HP.