Installed the JBD chip tuner set to 100% last week.
The install took not even 5 minutes.

Well my first impression was the thing is broken since I was not able to feel a difference.


However, I drove 120 miles yesterday.

My guess is that the ECU had to adjust to the new chip tuner since now I can feel a massive torque difference and the M57 is now way more powerful in high revs.

Unbelievable how this 5k pound car, wind resistance of a single family home and a 3l I6 Diesel goes forward.

Diesel owners, that is the mod to get.