1971 Pontiac GTO
Continuing on the same platform, the 1971 GTO received a modest facelift with a different grille and headlights. However, the end was in sight for all muscle cars including the GTO. So, in 1971 all engines received a downgrade in compression ratings and horsepower. The 400 was again the base model, but now they rated it at 255 HP while the 455 as an optional engine received a 260 HP rating.
The top of the line engine option was the 455 High Output, which delivered 310 HP and retained the performance level GTO owners were accustomed to getting. However, as the muscle car segment started to decline, so did the GTO sales. And in 1971, Pontiac managed to move just over 10,000 cars, which was a low number compared to just a few years prior.