The 2010 Chevrolet Corvette Grand Sport went straight from the factory to Callaway for conversion into the supercharged SC606.
The vehicle has exceeded 300,000 miles while preserving its original engine and bottom end.
This C6 first served as a promotional vehicle and later supported research and development work at Callaway.

Chevrolet introduced the C6 Corvette Grand Sport in 2010. Callaway quickly obtained one of the first examples to create its own upgraded model. Known as the SC606, the tuner added an Eaton supercharger to the LS3 V8. The result delivered 606 horsepower, a notable increase from the standard Grand Sport output of 430 horsepower.

Callaway went beyond simple power upgrades by engineering these cars for long-term reliability. The original development and marketing SC606 demonstrates that approach, having now passed 300,000 miles on its factory engine.

The path this car took to its current owner adds an interesting chapter. It accumulated hundreds of miles during Callaway research and development testing. Later a product manager arranged for a friend to look after the vehicle.

Although kept in storage, the caretaker received instructions to drive it regularly rather than let it remain idle. That proved simple with a well-prepared and potent C6 Corvette finished in striking red paint.

Weeks stretched into months and then years. In 2020 Callaway chose to sell the car. The longtime caretaker reached an agreement and officially took ownership.

While not the highest-mileage C6 in existence, this example stands out because the modified engine continues to perform well. The car also looks outstanding thanks to the owner's careful maintenance.

What do you think?

Motor1's Take: Vehicles like this are meant to be driven rather than left unused. This Callaway SC606 shows that properly maintained modified cars can achieve high mileage without issues when owners stay on top of upkeep.

More stories like this would be welcome instead of low-mileage examples that rarely leave the garage.