This isnt Need for Speed or the Fast and the Furious everything has it limit but there are infinite NOS mods out there
Yeah, theres in infinite NoS, but noone cancelled Tuning where you can config NoS as much as you want if you have CJD Mod installed
There are mods for unbreakable engines, perfect radiators, tires that dont explode with unrealistic grip and 20k+hp cars. Its not very out of reach.
N2O is fuel dependent; as You run out of fuel vehicle will stop with or with no N2O armed and igniting. Ask Yourself If You can use Infinite Fuel cheat instead.
I don't think I have an infinite bottle yet, the thing is, the more NOS, the heavier the bottle, so infinite one would be infinitely heavy, same with fuel tank. But I have some weird engine settings that can make it use no fuel, and that also instantly affects NOS because it's just an oxidizer for fuel and you run out of it in a relative rate to fuel.