Due to stricter government regulations, the era of unrestrained factory-built performance was coming to an end in 1971. However, GM's excitement division answered with the largest displacement engine ...

The Pontiac 455 H.O. sits at the crossroads of cubic-inch excess and the first real wave of emissions-era compromise, which is exactly why collectors obsess over when it was built and what those cars ...

Pontiac was never good at letting go. Even as emissions strangled Detroit’s horsepower culture, the division that built the GTO refused to surrender quietly. And in 1975—against logic, policy, and ...