Last week, Lutz Performance upgraded my í07 328i from AA tune stage 1 to AA tune stage 2.
Iíve had the AA tune stage 1 for about nine months and 17k miles. Here was my post / review after stage 1 install. Lutz Performance handled it for me then as well
Iíve been very happy with the stage 1 tune, no problems whatsoever. I was very interested to learn that a stage 2 upgrade could add even more power (around 6hp more than stage 1) for a very reasonable upgrade cost. So, naturally I contact Andrew at Active Autowerke for more details and then contacted Andrew Congleton at Lutz to arrange it.
Very very happy with the stage 2 tune. After driving for a week, the carís ECU has adapted and there is clearly a feel of more power from around 3k rpm and higher. Itís not startling increase over stage 1, but itís noticeable and worth it IMO.
Anyone with an N52, thinking of spending $$ on an intake or any other mod to increase performance should consider this; if you live in central / west Florida, having it flashed by Lutz is a good option, Iím glad I did.