[jordan986]

I did not hear of the whole ecu adjusting to the changes thing but I purchased the Giac chip. Performance I would say are minimal... that being said previous to getting the chip I had done a few 3rd gear pulls against my friends 02 330i starting at about 110kms to redline without the chip i was managing to pull maybe a half car length on him by the end of third, with the chip installed i was able to get a little (and I mean little maybe a bumper) over a car lenght (that was right to the end of third) which is pretty good in my opinion. Would I buy it again if I had the option -yes, will you notice a difference maybe a little. I also have a evo intake and boxster s exhaust... exhaust made very little difference in my opinion but the evo intake is great perhaps its just the sound that makes it feel faster but hey I love it!