Chevrolet Impala SS
The legendary SS (Super Sport) package has its place in muscle car history as an important model that promoted performance to the general public. This was one of the first high-performance automobiles that were relatively affordable and fast. Everything started when Chevrolet decided to transform its 409 truck engine for use in passenger cars. There they discovered that the unit was very powerful and could outrun all other vehicles on the road. Just by mild modifications to the engine, it could produce up to 409 hp. That was enough to propel the Impala from a standstill to 60 mph in six seconds flat (via Motor Trend).
At the time, that was Corvette territory. So as a mid-year introduction, Chevy presented the SS package. It featured bucket seats, sports trim, and other details, and came with a 348 V8 engine with 350 hp. However, the most attractive option was the 409 V8 with up to 409 hp if you opted for the dual quad intake system. This started the SS sub-model for the Impala lineup from 1961 to 1969. Chevrolet offered the biggest and most powerful engines in the prestigious SS package for its two-door coupes and convertibles. That turned a regular family car into a fire-breathing full-size muscle car.