No, they had Emissions on them but I can't remember the HP ratings. That maybe the Corvette and SS model Camaro. Another one could be the Pontiac Firebird. Ford had downsized the Mustang with 4 cylinders. I know that the non SS Camaro had small,2.8 liter V-6 engines. I had one. They were Electronic Fuel Injected, EFI and computer controlled. That was in 1985. I had one of them. even with small engine, They had plenty of power but also got good gas mileage.