[Unichip Jack]

Yes, we buy/get (thanks to all the companies that send samples... UPS just dropped off 2 from K&N), install, and calibrate all those parts.

Yes, every mass produced car is different they but all have adaptive ECU's to normalize each car to ensure it runs pretty much like every other car... emissions, power, mileage, etc…

Normalization is the only way mass produced vehicles can all run without constant attention. You can essentially drive until the parts wear out without a "tune up" and you can pull the ECU out of one and put it into another and it will act pretty much the same once adapted... for a little more info, read... http://www.unichip.us/265-faq-ecu-learning

Even with normalization, small variances (median and standard deviation… anyone, anyone…?) remain which is why we offer maps with slightly more fuel, slightly less fuel, slightly more timing, slightly less timing, and every combination of all of the above. You can download them at home in about a minute and see which one your particular car likes best.

As mentioned by some Unichip users above - thanks - you can also either go to a shop and have tuned or can get the software and tune it yourself. Depends on your personal $/bhp tolerance.

Cheers