You can find the chip tuning file for your BMW Z4 E85 - 2003 - 2008 3.0i 258hp 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 3.0i 258hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 258 HP to 278 HP, 300 Torque to 320 Torque.