The tunes on the Raser

so uhhhhhh, the Raser has some tunes CLAIMING that it’s faster then 599XX Evo, saying 600kph or 372.823 mph, people, i think we have a new fastest, except i just can’t seem to get it to that speed. (might be an xbox thing that it won’t work), but i’m just confused

Do you know how to tune rally springs so the back end clips into the ground at high speed? That would be the key to making the Tachyon go that fast. I saw the hype, guess I will try one of the tunes that claims 600 km/h to see if it is real.