I just purchased a 2001 silver/charcoal-grey e55.This is a nice car but i would like to make it faster. I've noticed numerous vehicles coming out that are just as fast as the E55 or faster including the new M3 and several others. I'm told there is a chip that will make the car faster. Does anyone know anything about these chips like how they work, how much etc. Also i heard a different air filter could increase performance. Any ideas or suggestions from anyone.