Experience a complete performance transformation with Mini Cooper JB4 Software, the most advanced plug-and-play tuning solution for turbo Mini models. JB4 delivers real-time map switching, higher boost control, improved throttle response, and optimized fuel trims—without permanent ECU changes. Whether aiming for better acceleration, smoother torque curves, or customizable performance maps, this software offers unmatched tuning flexibility. Perfect for Mini enthusiasts who want safe, dynamic, and instantly reversible power gains.