Top 20 Muscle Cars of All Time

9. 1970 Buick GSX 455 Stage 1

The Buick Gran Sport 455 (G SX 455) was a powerful muscle car built in 1970. The GSX Stage 1 was Buicks answer to the Pontiac GTO Judge. Advertised as “Another ‘light your fire’ car from buick” it came standard with a 455 cubic inch engine that produced 360 horsepower and 510 lb-ft of torque. The 510 torque rating was the highest torque output of any American made performance car, a title it held for 33 years until being surpassed in 2003 by the series 2 V10 Dodge Viper. Only 678 GSXs were produced in the second half of the 1970 model year beginning in March 1970. Just 278 were equipped with the standard 455, making the GS X a very rare vehicle.