In 1990, the Chevy Camaro chalked up its worst sales year on record, but that’s mainly due to an abbreviated model year run – the 1991 Camaro arrived early in 1990. Dealers moved fewer than 35,000 1990 Camaros, all of which got a driver’s side airbag. The base Camaro RS received a new standard 3.1-liter V6 making 144 horsepower, but a stronger 170-horsepower 5.0-liter V8 was optional. A 220-horsepower V8 was also offered in the RS Coupe. The 230-horsepower IROC-Z received new wheels, revised trim detailing, and a limited slip differential. This was the last year for the IROC-Z, which was replaced by a revived Z28 trim for 1991 after Chevrolet lost rights to use the IROC name on the Camaro.