The '57 Chevy is one such vehicle ... The result of this marriage of design excellence and mechanical muscle was a car that shouted its presence; It's a shout that resonates to this day.

In 1973, performance figures had dropped dramatically but some muscle cars could still hold their own in a straighr line ...

In the end, just 57 Impala RPO Z11s were built ... The pinnacle of the golden era of Chevrolet muscle cars, the car was born out of the Central Office Production Orders (COPO) program.

but Chevrolet seemingly didn't get the memo. New emissions mandates and consumers' desire for more efficient vehicles had all the classic muscle cars detuned into parodies of their former badass ...