14. Pontiac Firebird Trans Am SD 455
By 1974, almost all of the muscle cars were extinct from the market. Those that were left were robbed of their power and style. However, there was one model that managed to survive and offer as much performance and power as possible. And that model was the ‘74 Trans Am Super Duty 455.
The year, 1974, marked the first restyling of the whole Firebird range. And with the new front and rear end came the improved interior and details. The carried the SD 455 model over from 1973 but in a new package featuring a better suspension and brakes. The standard 455 V8 only produced 215 HP, but in SD trim it developed 290 HP, which was fantastic for 1974.
In fact, with 290 HP, a host of performance upgrades and four-speed manual transmission, the 1974 Trans Am SD 455 was even faster than the Corvette. And that is what made it the fastest American production car of the period.