JB4 for Hyundai / Genesis 3.5L Turbo SmartStream (V4) 458 Please confirm the size you

Please confirm the size you need before ordering

2 Mini Cooper John Cooper Works R56

- No additional work is required to finish the product

not how it performs on a dyno

JB4 for Hyundai / Genesis 3.5L Turbo SmartStream (V4) 458 Please confirm the size youPower gains of up to 100hp and 100tq to the wheels on a stock vehicle The JB4 is a plug and play Hyundai Genesis performance tuner that connects to easy to access sensors in the engine bay and works with your factory ECU to optimize boost, timing, and fueling for stronger performance and reduced turbo lag. Unlike basic tuning boxes, the JB4 includes a fully programmable CANbus system, upgradable firmware, and data logging. CANbus integration allows