The Yenko 1981 Camaro Turbo Z, with only 19 models ever made, is the rarest Chevy muscle car of the 1980s

Yenko based his engine layout on a turbo kit by Turbo International but added his own personal touches to keep things street-legal.

Also on the dash was a water injector bottle indicator light panel, since Yenko included forward-thinking water injection, along with a fuel heater to avoid issues of problematic stumbling that often occurred with early turbocharged applications.

The 5.7-liter V8's 8.2:1 compression worked well with the forced induction addition and power estimates suggest 240-250 horsepower was attainable. Positraction and the factory three-speed auto, only available with the Z28's 350 option, remained on duty. 

Equipped with Weld two-piece wheels paired with Koni shocks and, underneath, Guldstrand polyurethane bushings in place of the factory rubber pieces. Inside, an appropriate Racemark steering wheel and matching Kamp leather seats replaced the stock versions to complete a race-ready package.

https://www.hotcars.com/rarest-chevrolet-muscle-car-80s/