Ever since it first rolled off the production line in late 1966, the Chevrolet Camaro Z28 has symbolized the model's race track capabilities. Originally designed to compete in the SCCA Trans-Am series, the first Z28 was powered by a 302 cu in small-block V8 that produced 290 horsepower. Funnily enough, this trim package wasn't advertised to customers; it was a word of mouth sort of thing. The word soon got out as track enthusiasts quickly discovered GM's dirty little secret. The Z28 is still with us today, only now it produces 580 hp.