Hi,
I have a 2013 ATS4 2.0T, all stock, and I use 91 octane, 0% ethanol, gas. What kind of hp and torque increase can I expect with the intune? Should I expect a solid 15% increase or something less/more? I also have a 2015 Mustang GT, all stock, - same gas. What should I expect from it? Also ...