Bully Dog’s new BDX hand-held performance tuner gives drivers the edge they need, whether tackling tough terrain, pulling a heavy payload or maximizing fuel economy on the highway. Its sleek design, full-color display and customizable gauges help track and adjust powertrain performance to deliver more horsepower and torque when it’s needed most. Cloud-based tune delivery over built-in WiFi means that the BDX will always be running the latest tuning- enabling drivers to stay one step ahead of the pack. This Product does not support any changes to your vehicle’s emission system.