26. Pontiac GT-37
One of the rarest and forgotten muscle cars is the Pontiac GT-37, Yet it was not a model of its own. It was just an option package for the 1970 and 1971 Tempest. Pontiac advertised the GT-37 as a “GTO Lite.” However, the car lacked exterior features like the famous Endura bumper and rear spoiler.
So for 1971, they offered the famous 455 V8, but it went in only a handful of cars. Simply, the GT-37 had the performance and hardware yet it didn’t have the GTO’s appeal and image. That resulted in bad sales. In two years, Pontiac made only around 2,000 of these misunderstood muscle cars.