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 ...

The 455 HO was the icing on the GTO cake in 1972, with the engine producing 300 horsepower (this was the net rating, as Pontiac now aligned with the new requirements in the United States for engine ...

Nineteen-seventy is often considered the high-water mark of the muscle car era, but for whom? That was the year General Motors lifted its rule that limited A-body vehicles (Chevelle, Tempest, F-85, ...

The Chevy 454 V8 and the Pontiac 455 V8, two of the most iconic engines from the 1970s, have powered some of the most memorable muscle cars of that era. The Chevy 454, particularly in its ...

The Pontiac Firebird debuted in February of 1967, built on the same F-body platform as the Chevy Camaro, which had bowed five months earlier. The Firebird was a bit of a consolation prize for Pontiac, ...

The 1967 Pontiac GTO marked a turning point for muscle car engines, with a new 400-cubic-inch V8 that came in several ...

Editor's Note: The following story on budget-prepping Pontiac engines was prepared by Craig Hendrickson and Kern Osterstock, the two principals of H-0 Racing Specialties, Post Office Box 429, ...

Oooh, two General Motors V8s within a cubic inch of each other! They have to be nearly the same engine, right? After all, the Chevrolet 454 and Pontiac 455 come from the same corporate parent, and ...