The 1965 Pontiac GTO Tri-Power did not just add more carburetors to a midsize coupe, it crystallized what you now recognize ...

Last month HPP introduced to the readers a '64 421 H.O. Tri-Power engine buildup being performed by Jim Taylor. The goal of the project is to try and find 100 additional horsepower in a cast-iron ...

Although Pontiac’s legendary GTO was born earlier as an option package on the LeMans in coupe, hardtop, and convertible body styles, it was for the 1966 model year when it became a separate nameplate.

The Pontiac 421 Tri-Power was a standout engine during the golden age of muscle cars, known for its impressive performance and unique design. Enthusiasts and collectors continue to admire its ...

In the beginning, muscle was measured by sheer displacement. Detroit’s golden age hadn’t yet found its shape, but the air in the early 1960s was thick with rebellion. Before Pontiac’s GTO broke the ...