This 1988 Chevrolet Corvette convertible was modified by Callaway Cars of Old Lyme, Connecticut, to their Twin Turbo specification. It is powered by a twin-turbocharged 5. 7-liter L98 V8 linked with a four-speed manual transmission and a limited-slip differential, and it is finished in black over Saddle leather. Equipment includes a saddle convertible top, a body-color hardtop, 17″ Dymag wheels, power-adjustable seats, a Delco-Bose sound system, cruise control, power windows, and air conditioning. Recent work consisted of rebuilding the transmission and turbochargers, and replacing the scavenge pump and fuel pumps. Acquired by the selling dealer in 2025, this Callaway C4 shows 16k miles an is now offered in with service records, spare parts, and a clean Wisconsin title.