Pratt & Miller unveils the new Corvette Z06 GT3.R for IMSA and FIA WEC racing, with a starting price of $735,000 per car. Pratt & Miller will lead the umbrella racing program, now called Corvette Racing, as GM steps back from running the program. The new model features a production Z06 aluminum chassis, new aero solutions, and an all-new 5.5-liter V8 engine.#corvetteracing