Power gains of up to 100hp and 100tq to the wheels on a stock vehicle

Now includes the JB4PRO adapter and free app! The JB4 is a plug and play Kia Stinger / Genesis G70 3.3L 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.

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.

Also now available with our new JB4PRO board for more heavily modified cars which includes built in Bluetooth, built in ethanol sensor processing eliminating the need for a separate ECA, built in CPI/WMI control eliminating the need for a separate FSB, onboard data-logging memory, plug and play o2 bias wires, built in wiring ports for our 10 bar pressure sensors for low fuel pressure and/or coolant pressure, optional plug and play EWG harness add on, and includes many additional features to be unlocked in the future via free firmware updates! JB4PRO is the ultimate tuning tool for those looking to push their cars to the max!

It's well documented the Kia and Genesis platforms are prone to spark blow out at both stock and higher than stock boost levels. If your spark plugs have more than 25k miles on them we'd also suggest upgrading them when running higher boost levels

Wirelessly Connect to your JB4: Includes our all-new JB4PRO smartphone connection to wirelessly connect the JB4 via Bluetooth to your iOS or Android device. The JB4PRO Free app allows you to change maps, record and analyze vehicle and tuning data, and update JB4 firmware as we release 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 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 info on how to use the JB4PRO Free app click here.

JB4 Features and Benefits

• Power gains of up to 100hp and 100tq to the wheels on a stock vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 tuning software and up to 8 maps for various fuel and modification levels
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• View and record up to 40 gauges/engine parameters in real-time with the JB4 app.
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
• Compatible with JB4PRO app for smartphone logging, tuning changes, and adjustment
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• CANbus OBDII integration offering unrivaled tuning features and performance
• Improved performance over non-integrated chip tunes
• Runs as smoothly as stock. This is how your vehicle should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• 91 octane fuel or better is required for performance gains
• Not VIN locked and can be removed without a trace and resold down the road
• Includes the rugged JB4 billet aluminum enclosure for protection
• Designed and assembled in the USA
• 5 year warranty

Vehicle Fitment

JB4 is compatible across the entire Kia/Hyundai/Genesis turbocharged lineup! If you don't see your vehicle listed, send a quick photo of your engine bay to [email protected] & we can verify which JB4 is compatible.

KIA
• 2018-2023 KIA Stinger GT, GT1, GT2 3.3L Turbo

Genesis
• 2018+ Genesis G70, G80 3.3L Turbo
• 2017+ Genesis G90 3.3L Turbo

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 and is sold in over 67 countries worldwide.

DYNO RESULTS

2018 Kia Stinger, JB4, 91 octane, BMS intake, BMS WMI

Stinger stock vs. JB4, 91 octane, factory intake

Stinger with JB4 map2, 91 octane, BMS intake

Stinger with JB4, 30% E85, BMS intake