• Increase the power & performance of your Kia Stingers
• Gains up to 100whp & 100wtq to the wheels on a stock Stinger 
• This plug & play JB4 tuner plugs into easy-access sensors
• What is a JB4? Read more about it on our site: (FOUND HERE)
• BMS JB4 uses dedicated 10 bit digital to analog converters 
• Each kit includes maps for 91 octane, 93 octane, and E85 
• Gain performance of up to 100hp and 100tq to the wheels
• The JB4 includes a billet enclosure and fuel control wires 
• Your fuel economy is unchanged during normal conditions 
• Compatible with smartphones for tuning and adjustments
• JB4 is able to read and delete fault codes on your Stinger 
• Control and modulate multiple options for your Kia Stinger
• We do not accept returns for this item under any condition
• IF YOU ARE IN CALIFORNIA, PLEASE REACH OUT TO US 1ST BEFORE ORDERING, AS THIS PRODUCT CANNOT BE SOLD TO YOU, AS IT IS NOT LEGAL FOR SALE OR USE IN CA. PLEASE CONTACT US 1ST BEFORE ORDERING.
   

Features:

• Developed & made in the USA
• Includes the fuel control wires 
• Each unit is not locked to a VIN
• Quick plug-and-play installation
• 5-year warranty offered by BMS
• BMS billet all-weather enclosure
• Ethanol compatible tuning maps
• Compatible with all driving modes 
• OBD II cable included in each box
• JB4 Install Instructions: (FOUND HERE)
• JB4 free mobile app for IOS: (FOUND HERE)
• JB4 free mobile app for Android: (FOUND HERE)

Vehicle Application:

• 2018-2023 Kia Stinger (All Models)  
   

JB4 Pro Bluetooth Adapter included:

• As of June 12th, 2026, the 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 BMS releases 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
   

Available Spark Plug Upgrade:

• Upgrading your 2.0T, 2.5T, or 3.3T spark plugs to the HKS Spark Plugs is required when using the JB4 tune. We have had customers try to use the OEM plugs and end up having issues with the car. Please make sure to choose the correct engine option in the drop-down menu to ensure we send you the correct spark plugs