For the Jaguar XKR.1 ECU reprogram, the software delivers improved throttle response and increased power across the entire RPM range. Specifically tuned for different fuel, climate, and hardware our estimated gains for the XKR reach 55+ horsepower and 65+ pounds of torque (91 octane). But with this model being equipped wth a supercharger we take it one step further and upgrade the pulley as well, bringing gains up to 80+ horsepower and 90+ pounds of torque (91 octane).

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