Article content SSCâs journey to and above the 300-mph mark has been marred with setbacks and controversy. First, in October of 2020, the company filmed what it said was a record run, but after YouTubers tore the footage apart, it admitted there had been a mistake on the âediting sideâ and the car had not in fact reached the 331-mph (532-km/h) mark. We apologize, but this video has failed to load. Try refreshing your browser, or SSC confesses it didnât actually break the 300-mph barrier after all Back to video During a second attempt months later, the car experienced âheat-soak issuesâ and was again unable to get up to speed.Â