There are thousands of modified muscle cars on the streets already faster than the Demon. This is only a big deal to reporters. Putting a power adder on any V8 is not particularly hard.

In 2009 I put a 2.3 whipple supercharger on my 2006 Mustang GT, making approximately 550 hp in a 3500lb car. Best ET was 11.69. Once you are faster than 11.5 you must install a roll bar in your car, something that I was not interested in for a street car.

As an aside, I have never been in a collision or received a speeding ticket in the Mustang. I have maximum merits in MB's driver rating system and get a 33% reduction on my insurance premiums in this car.