Callaway B2K
The special edition Callaway Twin Turbo Corvette was available from 1987-1991. The 1987 production version of the Callaway Twin Turbo B2K option provided 345 hp (257 kW) and 465 lb·ft (630 N·m) of torque, with a top speed of 178 mph (286 km/h). For 1988, Callaway increased the stock performance of the Twin Turbo Corvette to yield 382 hp (285 kW) and 562 lb·ft (762 N·m) of torque. The 1989 Callaway Twin Turbo option provided the same power output as the 1988. In 1990, GM finally introduced their ZR-1 Corvette which obtained similar performance characteristics as the 1989 Callaway Twin-Turbo option, although the B2K power was up to 390 hp (291 kW) and 562 lb·ft (762 N·m) of torque. To counter the ZR-1, for the 1991 model year, Callaway was able to bring up the output of the B2K option up to 403 hp (301 kW) and 582 lb·ft (789 N·m) of torque. 1991 would be the last year of the L98 engine which was the base engine of the Callaway Twin Turbo Corvette.
These engines were available in 1987, 1988, 1989,1990, and 1991.
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