You can find the chip tuning file for your BMW 1 serie E87 - 2007 - 2011 135i - N55 - twinscroll 306hp 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 1 serie E87 - 2007 - 2011 135i - N55 - twinscroll 306hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 306 HP to 365 HP, 400 Torque to 520 Torque.