the chip optomizes the new parts performance. the stock EDU may realize something is different, but wont really know how to mkae the most of it. A reprogramable chip maximizes what it knows you have and reacts in the same way the OEM chip does to future upgrades not on the chip. I think Bavauto reprograms them free too, but Im not sure.
If I were to get a chip, The Jim Conforti chip is what i would get, as it causes the most gains.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>
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