Official or not, that is one hell of a car.
For aftermarket tuners, the ability to build a record-setting car is a major source of pride. And in the last few years, one of the most hotly contested records is that of the fastest standing mile. The 267 mph set by Heffner Performance in 2010 stands as the record, but Underground Racing had the idea that they could at least beat the time, if not the top speed, with their 2005-horsepower Lamborghini Gallardo Superleggera.
Though the data was not officially logged, the car managed to break the 22-second barrier, at least officially enough to satisfy the bet that was riding on it. The car's speed is said to have been 265.2 mph, not a record but also not the number they were concerned with.