Two tuners in SA advertise that they can do upgrades (RGM -a chip) that increases the 135Kw to 160Kw on the BMW 320I F30Torque figures go up to about 320Nm if I am not mistaken. Then I read in another motor magazine that there is another Tuner (AC Schnitzer) who claims to be able to improve figures from 135Kw to 180Kw. And torque up to 350Nm on the F30. I drive one with 18" mags and find it be very slow on aaceleration when overtaking on the open road. Either have to gear down or plan your your overtaking for a month! A bit disappointed in the car's performance.What are other F30 drivers take on the performance increase? And how about your experience with your F30 320 petrol version? 0