the breakdown The 2010 Chevrolet Corvette Grand Sport was sold new to Callaway, which turned it into a supercharged SC606. While retaining its original engine and bottom end, the car has covered more than 300,000 miles. Chevrolet launched the C6 version of the Corvette Grand Sport back in 2010. Dubbed the SC606, Callaway bolted an Eaton supercharger atop the mighty LS3 V8. There's clear proof of that too, since the original development and marketing SC606 just passed 300,000 miles—all on its original engine.