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The early C4's had their problems, what with the 1984 Cross-Fire Injection and its unusual 4+3 manual transmission. By the late 1980's, the fourth-generation Corvette had evolved into a more desirable automobile, thanks in part to the arrival of the ZR-1. 
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.
The Centennial Edition came finished exclusively in a Carbon Flash Metallic finish with satin-black graphics. Special badging graphics signifying Chevrolet’s racing history, including an image of Louis Chevrolet on the B-pillars, were added as accents to the cars finish. The wheels were also finished in satin black. All models also received red brake calipers. The exterior color scheme of the Centennial Edition Corvette is reinforced inside the car.
The C6.R ZR1 GT2, if you were to use its full name, was the model used in the last four years before the Corvette C7.R was introduced, and had a slick sequential manual operated by paddles that was combined with the rear differential to create a rear transaxle. This style of transaxle eventually made it into the road-going Corvette, especially the Grand Sport and ZR1 of the C7 generation.
2013 427 Collector Edition Convertible
The 2013 Corvette 427 Convertible served double-duty as a commemorative edition model.  While it marked the departure of the sixth-generation Corvette. The real selling-point was the powerplant at the heart of the car - a 427-cubic-inch (7.0L) LS7 engine, the same engine used in the C6 Corvette Z06.  Rated at 505 horsepower (377kW) and 470lb.-ft of torque (637 Nm), this 427 was the most powerful engine GM had ever installed in a production Corvette convertible to date.