Who modified camaro first copo or yenko?

Answer 1

The first significant modifications to the Chevrolet Camaro were made by Don Yenko, a well-known car dealer and racer, who began offering his modified versions in 1967. Yenko's cars, known as Yenko Camaros, featured performance upgrades and a more powerful engine. While COPO (Central Office Production Order) also played a role in the Camaro's performance modifications, particularly with the introduction of the COPO 9560 package, Yenko's modifications are often recognized as the first notable enhancements to the Camaro.