Mystery Muscle: These Strange GM Muscle Cars Will Blow Your Mind

Vukasin Herbez April 10, 2023

Pontiac Trans Am 20th Anniversary Model

In 1989, Pontiac celebrated the 20th anniversary of its favorite muscle car, the Trans Am. They decided to introduce a limited run of 1,500 vehicles to commemorate the occasion. But, they wanted their anniversary edition to be unique and not just another decal and paint job. So Pontiac installed Buick’s 3.8-liter turbo V6 from GNX to create the fastest Trans Am of the decade (via Top Speed).

It turned out to be an extremely rare and expensive one. The white commemorative edition could accelerate 0.1 seconds faster from 0 to 60 mph than the GNX at 4.6 seconds. The reason was simple. It had a better weight distribution and gearing from a Pontiac gearbox. Today, those cars are rare and highly-prized collector’s pieces.

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Buick Roadmaster Wagon

The legendary Roadmaster name returned to Buick’s lineup in 1991 after a 33-year-long hiatus. Gracing the freshly styled luxurious sedan and station wagon model. The car was the same as other offerings from General Motors in the same class. However, the Roadmaster had some more luxury options and one interesting engine, which turned this comfy cruiser into a muscle car (via Motor Trend).

Buick engineers found a way to install Corvette’s LT1 5.7-liter V8 engine into Roadmaster’s engine bay. The LT1 had 300 HP in the Corvette, and the Buick had 260 HP, which was more than enough to turn this heavy wagon into a proper hot rod. Despite the curb weight of over 4400 pounds, this car could outrun many of the muscle cars of the day.

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Chevrolet SSR

During the mid-2000s retro craze, the Chevrolet development team came up with a crazy idea to produce a nostalgic two-seater convertible pickup with muscle car performance. The result was the SSR. A vehicle that looked different from any other car on the market, not necessarily in a good way. The 1950s-inspired design didn’t work well, so the SSR looked plain odd (via Car and Driver).

Despite many efforts to make the SSR appealing to the intended audience, Chevrolet managed to sell just around 24,000 of these oddballs in a painful realization that they needed much more than wild imagination to make that concept work. The SSR wasn’t a Corvette, and it wasn’t a truck. It was simply pointless overall.

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Cadillac CTS-V Wagon

For years, Cadillac was without a proper performance series needed to compete with BMW or Mercedes. But finally, the V-Series arrived. It was all that Cadillac lovers dreamed of powerful engines, world-class handling and suspension setups, and exclusive production. Even the competitors noticed when Cadillac rolled up the brand-new V-Series models (via Car and Driver).

Under the hood was a supercharged 6.2-liter V8 with 556 HP, making the CTS-V the most powerful performance sedan on the market. Cadillac produced three body styles, and CTS-V could be a sedan, a coupe, and, interestingly a wagon too. However, the wagon body style was something Cadillac buyers should have expected. The car was still a blast to drive and extremely fast. It was just that the majority of the customers turned to sedans or coupes. Some buyers even needed to be made aware that the wagon existed.

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Mystery Muscle: These Strange GM Muscle Cars Will Blow Your Mind

Pontiac Trans Am 20th Anniversary Model

Buick Roadmaster Wagon

Chevrolet SSR

Cadillac CTS-V Wagon

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