ok i'm doing a lot of thinking about getting a custom turbo kit for my car. i already have a company that will make me the pistons, rods, bearings, etc... the pistons i can get oversized i think 1 or 2 mm's. if i did this i would have to bore out the cylinders obviously so that the new pistons would fit. now if this had to be done the displacement for the car would be completely different, changing it from a 2.5 L car to who knows maybe a 2.6 or 2.7 L engine. if this was to be done, would my computer have to be reprogrammed or something to get used the the new engine displacement etc...? or does that not matter whatsoever...i'm just curious about this, mike i'm sure you can answer this one.