How do I extend the gears in BeamNG.Drive?

I have a problem with gear extension in the box, can someone tell me how to do it? I made a car that has (attention) ... 532,218 horsepower, and normally it goes only 360 km / h, I want this facelifted 200bx to go with its vmax. I am asking for help with the extension of the gears in the gearbox.

 

Race adjustable final drive, and crank that number down.
Do the same with the race transmissions too

 

I put a bigger 2jz and now it goes 400, but is that what you mean?
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the maximum reduction of the gearbox settings does not work, the differential also does not work, which I am supposed to reduce, because on the gearbox my drive shaft is smashing when I try to accelerate

 

i mean, it does have 500000 horsepower. you might want to see if you can put an indestructible driveshaft on.. otherwise, idk

 

i cant