The owner of a highly-modified Ford GT is claiming a world speed record for a road car after hitting a claimed 500km/h on the NASA Shuttle landing strip at the Kennedy Space Centre in Florida.

For now, there is no independent confirmation to back the phenomenal claim, which would make this particular Ford GT faster than a Formula One race car.

The driver pushed his twin-turbo 2006-model GT – with the number plate BADD GT – along the 4.5-kilometre strip and claims his data system reported a top speed of 310.8mph (500.184km/h).

“Undisputed fastest street car on the planet Earth,” the driver, performance tuner Johnny Bohmer, said after his run.

But there is no independent verification of his claim, although Mr Bohmer and his GT previously hit 283.232mph (455.8km/h) in 2012 with a run that was verified by Guinness World Records as the fastest standing mile speed run by a road-legal car.

Mr Bohmer is the owner of Performance Power Racing (USA) and his Ford GT produced a claimed 895kW for its original record run, although that was boosted to 2000kW by 2018 and he was tuning for more power and performance at the time of his claimed 500km/h run.

By Australian standards, the BADD GT is well beyond the limits of a road-legal car – although it is licensed and insured for street use in Florida, even though it has a…