There is no better car to dictate the steep decline of muscle car performance during this time than the 1970s Buick GSX. Produced for just three years (from 1970 to 1972), the Buick GSX started ...

While all the other automakers detuned their muscle in 1972, Buick put out this beast with the same 360-horsepower 455ci V-8 that powered the 1970 GSX to glory a few years earlier. By '73 ...

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*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title ...

Prices shown are the prices you can expect to pay for a 1972 Buick GSX 2 Door Hardtop across different levels of condition. Edit options.

Prices shown are the prices you can expect to pay for a 1971 Buick GSX 2 Door Hardtop across different levels of condition. Edit options.

Equipped with the automaker’s 455 V8 engine, the Buick GSX was capable of up to 360 horsepower and a whopping 510 pound-foot of torque. The GSX was a direct competitor of cars like the GTO and ...