A year later, now with a new cam and heads, the 409 was kicking out 380 hp (385 PS) with a single four-barrel carb. But ...

The Z11 option was a drag race-oriented 427 option for '63 Chevy Impala Sport coupes, that offered a conservatively-rated 430 hp from the stroked 409. Aside from the Z11 option that got fitted to ...

With just 57 units produced, the rare Z11 V8 is the rarest Chevrolet engine ever and remains valuable today. The Z11 V8 was a powerful drag racing engine based on enhancements made to the 409 ci ...