The Callaway twin-turbo conversion was a special option available through select Chevrolet dealers from 1987 to 1991 under the Regular Production Code (RPO) B2K ... of the C4 Corvette, shows ...
If you ticked the “RPO B2K” box on your neighborhood ... From the seller: “1988 Chevrolet Corvette C4 Callaway Twin-Turbo with 15,660 miles in dark red metallic (74U) with tan/red leather ...