It all started in 1961 with the 409 CHEVY SUPER SPORT: ICONIC SS STYLE & PERFORMANCE; the 615-horsepower BLAZER SS continues the legacy! On December 17, 1960, both the Impala SS (Super Sport), one-off showcar, above, and the legendary 409 engine were announced. The initial version of the engine, with a single Carter AFB four-barrel carburetor, produced 360 horsepower. In 1962, this same engine generated 380 horsepower, and a new dual-quad 409 horsepower 409 topped the option list. The o...