[soulkj]

hello, i drive a 330i sp(step, euro) and im planning to install an intake and an exhaust in the future. i just have a few questions in hope that someone could help out.
do i need to do anything to the computer after i install an intake and/or an exhaust? (in order for the car to adjust)

what is the best mod for the car (in terms of increasing horsepower) keeping in mind that i dont live in the us?

thanks