Power gains of up to 65hp and 80tq to the wheels on a stock vehicle

The JB4 is a plug and play Kia / Hyundai / Genesis 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 to take into account pedal input, throttle position, gear, engine speed, air/fuel ratio, fuel trims, ignition advance, knock, and many other factors and incorporate those into the performance mapping. It can also read/delete fault codes, includes unique safety features such as keeping boost pressure low until oil and water is up to temperature to provide proper engine and turbo lucubration and drop to a low boost map if the engine starts to overheat, run lean, excessively knock, or over boost.

The JB4 offers a lot more performance, functionality, and safety than your average performance chip.

The default JB4 map1 runs 4psi over stock peak and tuned maps, including stock and valet mode can be selected on the fly using a BMS diagnostics cable or JB4 mobile smartphone adapter.

Installation is very discrete and it quickly removes without a trace when needed. Includes maps for 91 octane, 93 octane, and E85 (ethanol fuel) mixtures. Fuel economy during normal driving is unchanged. Compatible with all driving modes.

More information at JB4tech.com

Wirelessly Connect to your JB4: Our all-new JB4 PRO smartphone connection is included to wirelessly connect the JB4 tuner to your Bluetooth 4.0 compatible iOS or Android device. This option allows you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns. 

For more information about the JB4PRO mobile app click here.

Key Features

• Power Gains: Up to 65hp and 80tq to the wheels on a stock vehicle.
• Enhanced Performance: Improves 0-60 and 1/4 mile times.
• Advanced Tuning Maps: Includes custom JB4 tuning software and up to 8 maps for various fuel and modifications.
• E85 Compatible: Offers ethanol (E85) compatible maps.
• Fault Code Management: Ability to read and delete fault codes.
• Data Monitoring: View and record up to 40 gauges and parameters in real-time using the JB4 app.
• Boost Control by Gear: Adjust boost in 1st, 2nd, and 3rd gears for optimal launch.
• Comprehensive Safety Features: Keeps boost low until optimal temperatures are reached and reduces boost if the engine overheats, runs lean, or overboosts.
• Quick Installation & Removal: Plug & play installation, VIN-free and removable without a trace.
• CANbus Integration: Offers unrivaled tuning capabilities and performance.
• Bluetooth Connectivity: Use the JB4 Mobile app for smartphone-based tuning and data logging.
• Seamless Driving Experience: Runs as smoothly as stock and maintains fuel economy during normal driving.
• Fuel Requirements: 91 octane or higher for performance gains.
• Durable Construction: Includes a rugged billet aluminum enclosure for protection.
• Quality and Warranty: Made in the USA with a 5-year warranty

Fitment

Kia Models

• 2020+ Kia Stinger 2.5L Turbo 4-cylinder
• 2020+ Kia Sorento 2.5L Turbo 4-cylinder
• 2019+ Kia K5 2.5L Turbo 4-cylinder

Hyundai Models

• 2020+ Hyundai Santa Fe 2.5L Turbo 4-cylinder
• 2020+ Hyundai Sonata 2.5L Turbo 4-cylinder
• 2022+ Hyundai Santa Cruz 2.5L Turbo 4-cylinder
• 2022+ Hyundai Kona 2.5L Turbo 4-cylinder

Genesis Models

• 2020+ Genesis G80 2.5L Turbo 4-cylinder
• 2020+ Genesis GV70 2.5L Turbo 4-cylinder
• 2020+ Genesis G80 2.5L Turbo 4-cylinder
• 2020+ Genesis GV80 2.5L Turbo 4-cylinder

If You don't see your Model, Please Check Here.

What is a JB4?

The JB4 is a plug & play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus, fuel & spark control, Bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. In addition, the JB4 system is not VIN-locked to your vehicle and can quickly be removed and swapped between cars or resold at a later time. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.

Document & Video

Install Guide