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The Chevrolet Impala was introduced in 1958. It was basically an upscale Bel Air the first year. In 1959 the Impala became it's own separate model.
1967 Chevy Impala
Chevrolet Impala was created in 1958.
The Chevrolet Impala SS, or the Impala Super Sport, was introduced to the public in 1961. It was in production until 1969.
1968
Depending on the year of the Chevrolet Impala you are looking for there are 6 different body types. There have been 9 different generations in the life of the Chevrolet Impala, and the different generations each had the different body types.
1985 Chevrolet impala
The 2006 Chevrolet Impala has 12 valves.
The 2004 Chevrolet Impala has 12 valves.
The 2014 Chevrolet Impala has 16 valves.
The 2010 Chevrolet Impala has 12 valves.