What I would be looking for in "performance software" for my X would be activating the vanos earlier under a bit less load, slightly tweaking the spark timing advance, slightly tweaking the fuel map (and I mean not by too much on that one) and removing the top speed limiter (like I ever need to go over 155mph anyway)

Not all tuners cover all those areas, and most mainly change fuel trim and higher rev limiter... I would rather the timing and vanos changed for some low end results I feel in daily driving.

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X5 pics

RIP 4.6is.....

2003 4.6is