I completely misunderstood your statement below:

'Nowadays there is several 35d powered cars with meth injection over 500hp. There is even a 535d with 480hp/950nm tuned by Black Smoke Racing on straight random diesel.'

Could you let me know how is this power possible with meth injection??

This is for my knowledge only and not undermining anyone.

If this kind of power is possible on a diesel, I would sell my M5 tomorrow!

Also - how can this power sustain components such as the diff, suspension, brakes etc? surely these need upgrading prior to the power upgrade.