[NRG]

There is this marketing thing... If BMW would squeeze every bit of performance out of this diesel M57 engine at the selling price it sold, there would be no place for other gas or diesel motors cutentely available in the lineup. One would never justify paing more for a V8 gas if I6 diesel would yield same output while returning much better MPG.

The remap does not hit the seealing of maximum engine capability, it runs within safe margins. All BMW turbocharged engines are limited by quite a bit from the factory, leaving a lot on the table for tuners.