The diesel version of the European market Subaru Impreza has caught the tuning attention of Unichip, a firm that as its name implies, fiddles around with ECUs. The company claims that thanks to some subtle electronic tweaks to the 2.0-liter turbo diesel engine's fuelling and boost settings, output is raised by 18HP and torque by 33 lb-ft for a total of 168-horsepower and 291lb.ft of torque.
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