From 1984–1996, C4 Special Editions became legends: 1988 Corvette 35th Anniversary Edition (RPO Z01), 1986 and 1995 Corvette Indy 500 Pace Car Editions, 1990–1995 Corvette ZR-1 (LT5, RPO ZR1), 1996 Corvette Grand Sport (RPO Z16), and 1996 Corvette Collector Edition (RPO Z15)—limited builds, signature colors, and real performance gains.