Callaway has revised its upgrade program for the 2014 Chevrolet Corvette Stingray.

Callaway has revised its upgrade program for the 2014 Chevrolet Corvette Stingray.

At the beginning of the year Callaway introduced the SC610 package for the new Corvette and now the kit has been taken one step further by increasing output of the Eaton supercharger-fitted V8 6.2-liter engine to 620 bhp (462 kW) and "at least" 600 lb-ft (812 Nm). Both horsepower and torque figures are not final but will be announced in the weeks to come after testing and validation will be completed.

These power gains were possible by installing a three-element intercooler and tweaking the exhaust system while the engine now protrudes to the hood and according to the tuner this has improved heat transfer.

All these upgrades come with a 3-year / 36,000-mile warranty and are available for 22,995 USD plus the donor car.

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