You can find the chip tuning file for your BMW M3 E36 - 1991 - 1998 M3 321hp 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 M3 E36 - 1991 - 1998 M3 321hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 321 HP to 350 HP, 350 Torque to 380 Torque.