For those who are not satisfied with the performance numbers of their 4WD Subaru Impreza 2.0 Diesel, the Unichip tuners have released an upgrade that is surprisingly not for the Subaru STi model. Using the latest plug and play technology, the U-Connect piggy back ECU tuning software enables subtle electronic tweaks. Enhancing the Impreza’s fuel and boost output, the performance gains are quite significant. After being tested on the dyno, the new electronics added 17 bhp and 36 lb ft of torque over the stock Subaru Impreza model.