Upgrading your ECU is the easiest way to increase the power in your car, and the fastest way to put a grin on your face. Our ECU upgrade is done by us, thus requiring you to ship your unit to us overnight and then we will return it to you overnight. In all this process takes three business days. All ECU upgrades are guaranteed against defect, and if your dealer ever re-flashes your car and you lose our program we will reprogram for you at no additional cost. The Audi A4 2.0T (B7) ECU has an increase of 45hp and 65ftlbs or torque.