JB4 Performance Tuner for 2025+ VW Tiguan 2.0T 201HPPower gains of up to 40whp and 55wtq to the wheels on a stock vehicle The group 20 JB4 is a plug and play Tiguan tuner that plugs into easy to access sensors in the engine bay and works with your factory ECU tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. Unlike other tuning systems the JB4 includes a fully programmable CANbus system, upgradable firmware, and data logging capability. CANbus allows the JB4