As you may have guessed, SC652 is an indication of both the new supercharger fitted to the Z/28's 7.0-liter V8 and its increased output, which is up from 505 horsepower to 652 ponies. Torque, meanwhile, has jumped from 481 pound-feet to 620. These new figures allow the Callaway-tuned Z/28 to scamper to 60 in just 3.7 seconds and get through the quarter mile in 11.5 seconds.
The extra oomph was achieved thanks to a number of engine modes, not least of which is the Eaton TVS2300 supercharger. A liquid-to-air intercooler, new fuel injectors, a freer-flowing intake and a better-breathing exhaust also contribute to the Z/28's new sense of speed.
Outside of the engine work, though, Callaway knew what to leave well enough alone - the suspension, Brembo carbon-ceramic brakes and (shockingly) the aerodynamics remain identical to the standard Z/28.
The result is, we suspect, a wildly potent Chevy that we'd happily rocket across both road and track. Take a look up top for a gallery of images from Callaway.