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Originally Posted by rlsjr
Has anyone added a performance chip to their 2005 4.4? Is it worth infesting into? Was overall hp increased?
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PowerChip is the ECU software I went with. I have a 3.0i. About 15 hp increase. But there's more to it than that. Improves the responsiveness of the throttle in all ranges. Well worth it. Improved the mileage as well.
Looks like they have software for the 4.4i valvetronic.
http://www.powerchipgroup.com/intera...sp?pid=Bmw0171