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There were only 20 Z06s produced with the Competition Sport package for worldwide purchase. This Z06 is powered by a 7.0-liter LS7 V8 engine producing 505hp and 424 ft/lbs torque, paired to the 6-speed manual transmission. The LS7 engine can propel this Z06 from 0-60 mph in 3.6 seconds. This Z06 CSR features leather interior, articulated sport seats, premium audio system, CD player and heads-up display.
The 1978 Silver Anniversary Edition Corvette was developed to offer consumers a “collectible” model that commemorated one of Corvette’s milestone production anniversaries (its twenty-fifth anniversary in this case) in a way that had ever been done previously with any Corvette model year that had come before it. The car was mechanically identical to 1978 counterparts.
The Zagato company took a C7 Corvette Z06 and transformed it into the IsoRivolta GTZ, a "spiritual descendant" of the Iso Grifo A3/C (Corsa).  The original A3/C race car was developed by Giotto Bizzarrini not long after he left Ferrari, where he had served as cheif engineer behind the 250 GTO, which is revered as the world's most expensive car.  Bizzarrini purportedly fancied the A3/C as his "own personal evolution of (and improvement upon) the GTO design."