400hp w210, om606 Turbo or 320cdi?
400hp w210, om606 Turbo or 320cdi?
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One
You can ask about the turbomod from Alex or Antomies, both can do it.
Your "big question" is not the turbo, but decent software.
Quite a good results is possible only with chiptuning, without any changes in tech.
My car, stock with orig solenoid injectors and slippery turbine.
If you have E90/91 => piezo injectors => more power
E46 => power line is nonsense => lot of less