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 1967 Pontiac GTO High Output package did more than add a few extra horsepower. It crystallized how Pontiac could keep selling excitement in an era when corporate rules were starting to rein in the ...

The 2026 Dodge Charger marks a new era for this iconic nameplate, and the Sixpack HO Two Door version is the one that most ...

351 Cleveland engines in the four basic configurations: A. 2 barrel; B. 4-barrel; C. Cobra Jet; D. HO or Boss 351. It seems that in the world of high-performance engines, the 351 Cleveland has been ...

In stock form, a 5-liter HO Mustang is fast, and it might seem as though there isn't much that can be done to improve this already potent power plant. Fortunately, that's not the case. Tests have ...