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The most invariable aspect of a muscle car is the V-8 engine. You just can’t have a muscle car without a V-8. However, there are exceptions, albeit very few. You probably know of the Buick GNX, nicknamed “Darth Vader’s car”, which had a 3.8-liter turbocharged V-6, and, in 1987, was quicker than a Corvette. But, there was another car with the same engine – the 1989 Pontiac Trans Am 20th anniversary – and here’s what you need to know about it.
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