15. Plymouth GTX
Plymouth presented the GTX in 1967 as a luxury option in the Belvedere lineup. They based this model on the same platform as the Coronet. But it was much more luxurious with 375 HP 440 V8 as standard and the famous Hemi as the sole option. Because Plymouth wanted the GTX to compete with the luxury cars of the period, they installed all the possible creature comforts.
And then they topped it all off with a special trim on the outside to distinguish the GTX from the rest of the model lineup. However, when the early ‘70s came, most muscle cars started to lose their power and torque figures. So Plymouth discontinued the GTX in 1971 to keep it from being a disgrace to its fire-breathing predecessors. And that is why the ‘71 GTX is the last of its breed and a fantastic muscle car.