After the new S650 Mustang debuted in 2023 ... The goal was to max out the power of this American muscle car on a dynamometer (dyno for short), and they succeeded! The test results confirmed ...

The big Shelby Mustang of 1969 was rated at 335 hp and 440 lb-ft (340 PS, 597 Nm). Accounting for a 15% driveline loss, the dyno should say around 285 rear-wheel horsepower and 375 lb-ft (507 Nm).