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How the Oldsmobile 403 Became GM’s Most Controversial Trans Am Engine
The Oldsmobile 403 is one of the most misunderstood engines in American muscle car history. Installed in late-1970s Pontiac Trans Ams, this 6.6-liter V8 became the center of one of General Motors’ most heated controversies — and most fans still argue about it today. At a time when emissions laws were tightening and horsepower numbers were ...
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