The Chevrolet IROC-Z Z28 was a high-performance variant of the third-generation Chevrolet Camaro, produced from 1985 to 1990. It was named after the International Race of Champions (IROC), a popular stock car racing series in the 1980s.

The IROC-Z Z28 was introduced in 1985, replacing the previous Z28 model. It featured a 5.7-liter V8 engine that produced 215 horsepower and was available with a four-speed manual or automatic transmission. The IROC-Z Z28 also received a number of cosmetic upgrades, including a new front fascia, ground effects, and a distinctive hood scoop.

In 1986, the IROC-Z Z28 received a number of performance upgrades, including a new aluminum intake manifold and revised camshafts that increased horsepower to 230. The same year, Chevrolet introduced a new option called the 1LE package, which included performance suspension components and a high-performance exhaust system.

In 1987, Chevrolet introduced the IROC-Z Z28 convertible, which was available for the first time since 1969. The same year, the IROC-Z Z28 received a number of additional performance upgrades, including a new tuned-port fuel-injected V8 engine that produced 245 horsepower.

In 1988, the IROC-Z Z28 received a number of cosmetic updates, including a new front fascia, revised ground effects, and a new rear spoiler. The same year, Chevrolet introduced the IROC-Z28 Heritage Edition, which was designed to commemorate the 20th anniversary of the Camaro.

The IROC-Z Z28 was discontinued in 1990, along with the rest of the third-generation Camaro. It was replaced by the fourth-generation Camaro, which was introduced in 1993.

The Chevrolet IROC-Z Z28 remains a popular classic car among muscle car enthusiasts and is widely regarded as one of the most iconic muscle cars of the 1980s. Its combination of performance, style, and affordability made it a favorite among car enthusiasts, and it remains a sought-after collector car today.

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