1 definition by MuscleCarMan

Top Definition
A first-generation Big Block Chevrolet V8 engine. It was in the middle of the three "W-head" engines offered by Chevrolet; the others being the 348 and (very rare W-head) 427. It was phased out by the Mark IV series "Turbo Jet" big blocks by 1965.

The 409-inch engine was first available in 1961, and dominated the drag strip and stock car circuits in the early 60s. In 1963, the Impala SS 409 produced around 425 horsepower; an impressive feat for the technology of that era.

The Chevrolet 409 is subject matter of the Beach Boys song of the same name.
Nothing can catch her, nothing can touch my 409.

My 4-speed, dual quad, posi-traction 409.
by MuscleCarMan May 27, 2013

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