 The 1989 model year signified the return of the RS designation (last used in 1987 on a limited edition California only model).The Rally Sport was now the base model featuring body ground effects mimicking the IROC and the previous Z28 but with the 2.8 V6 fuel-injected motor as standard with the 305 as an option.The raised rear spoiler that became available in 1988 on the base coupes was short-lived and done away with for this year.