X3 performance modules??

[drod]

would be nice to add 40+ hp to the current X3. I've seen $50 chips to $600 DIY units. Obviously you get what you pay for, but has anyone really researched these solutions and more importantly, has anyone installed any of them? if so, what was the outcome?

i'm currently looking at the aFe Scorcher Programmer Upgrade for $450.00:

aFe Scorcher Programmer Upgrade - N55 - E82 135i, E9X 335i, F30 335i, F32 435i, F10 535i, E70 X5 35i, E71 X6 35i, - Turner Motorsport