Hello.

I'd like to ask if you have tried to remap NA M112 and dyno it. Is it worth? Is there a chance for power gain bigger than few HP?

Just doing a tune on the Crossfire M112 NA isn't much of a step. You should first change to a larger throttle body and improve the air flow with a cold air intake.
Also available are tunes for the transmission which help to wake up the acceleration. My guess would be about thirty HP gain.
There are many threads on this forum concerning this topic. You can search the stickies at the top of each section and use the search box in the upper right corner.
Thanks for asking and joining the forum.

Hi Zip439. Thank you for tips. The TB and intake have been modified - the Forum was quite helpful Now I'm looking for the next step.