You can find the chip tuning file for your BMW Z4 E85 - 2003 - 2008 2.5si 218hp vehicle on our site. These files are created especially for you and handed to you. All our Tuning files are extensively tested on Dynometer. The development of the tuning file for your BMW Z4 E85 - 2003 - 2008 2.5si 218hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 218 HP to 235 HP, 250 Torque to 270 Torque.