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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."
1997 Callaway C12 Corvette Silver
Callaway has built a firm reputation for producing some of the most sophisticated and advanced Corvette-based automobiles. Introduced in 1998, Callaway’s C12 continued this proud legacy. Designed, developed and constructed by two top German engineering and development companies, Callaway and IVM, the C12 was intended as a bespoke, high-performance car that offered its occupants a civilized interior and relaxed ride. One of the most respected Corvette super-cars ever.
Did you know that the earliest ZR1 Corvettes came into existence long before any of these later iterations?  If not, then take a few minutes to acquaint yourself with one the rarest small-block production Corvettes of all time - the 1970-1972 Corvette ZR1. From 1970 to 1972, Chevrolet offered the ZR1 Special Engine Package, which featured a small-block LT1 engine.