Description
Unlock additional performance from your Jeep with the Burger Motorsports (BMS) JB4 Performance Tuner, designed specifically for the 2026+ Jeep Grand Cherokee and Grand Cherokee L equipped with the 2.0L Hurricane 4 Turbo gasoline engine.
The JB4 is an advanced plug-and-play tuning system engineered to deliver increased horsepower and torque while maintaining smooth everyday drivability. According to Burger Motorsports, the system can provide gains of up to 60 wheel horsepower and 60 wheel torque on an otherwise stock vehicle, depending on fuel quality, operating conditions, and the selected performance map.
Unlike basic performance chips, the JB4 incorporates advanced processing, multiple sensor connections, and full CANbus integration to provide greater control over supported engine parameters. The system works alongside the factory ECU and is designed to retain factory engine safety strategies while offering additional tuning flexibility.
Its plug-and-play wiring harness allows for straightforward installation and removal without requiring a conventional ECU reflash. The JB4 also features multiple selectable performance maps, boost-by-gear control, data logging, diagnostic functionality, and support for compatible ethanol blends and water/methanol injection configurations.
Integrated JB4 PRO Wireless Connectivity
The tuner includes the new JB4 PRO wireless smartphone connection, allowing users to connect directly to the JB4 through a compatible Bluetooth 4.0-enabled iOS or Android device.
The wireless adapter fits entirely inside the JB4 enclosure, providing enhanced weather protection and a streamlined installation.
Through the free JB4PRO mobile application, users can monitor engine information, select performance maps, record and analyze vehicle data, and install available firmware updates.
The application also includes an intuitive interface, integrated help functions, and advanced data analysis tools designed to assist with performance monitoring and identifying potential tuning concerns.
Burger Motorsports regularly develops firmware and mapping updates to expand supported functionality and refine performance as ongoing development allows.
Key Features
- Brand: Burger Motorsports (BMS).
- Product: JB4 Performance Tuner.
- Designed for the 2026+ Jeep 2.0L Hurricane 4 Turbo gasoline engine.
- Manufacturer-claimed gains of up to 60 wheel horsepower and 60 wheel torque on a stock vehicle.
- Designed to improve acceleration, including 0–60 mph and quarter-mile performance.
- Advanced plug-and-play tuning system.
- Vehicle-specific installation harness.
- Multiple selectable tuning maps for different fuel types.
- On-the-fly in-dash map switching between factory and supported performance maps.
- Supports compatible E85 ethanol blends.
- Requires 91-octane or higher fuel for performance gains.
- Full CANbus integration.
- Boost-by-gear control to help improve traction in lower gears.
- Progressive water/methanol injection support.
- Built-in data logging functionality.
- Displays and logs up to 40 supported engine parameters.
- Integrated diagnostic trouble code reading and clearing.
- Exhaust flap control on supported vehicle configurations.
- Compatible with all factory driving modes, according to the manufacturer.
- Designed to maintain smooth, factory-like drivability.
- Manufacturer states normal-driving fuel economy is unaffected.
- Designed to retain factory engine safety systems.
- Removable installation without conventional ECU flashing.
- Not VIN-locked to a single vehicle.
- Can be transferred or resold, subject to application compatibility.
- Includes a billet aluminum enclosure.
- Designed and assembled in the USA.
- Manufacturer-stated 5-year warranty.
JB4 PRO Smartphone Connectivity
- Includes the JB4 PRO wireless smartphone connection.
- Compatible with supported Bluetooth 4.0-enabled iOS and Android devices.
- Wireless adapter installs inside the JB4 enclosure.
- Enhanced weather protection for the integrated adapter.
- Compatible with the free JB4PRO mobile application.
- Wireless performance map selection.
- Real-time vehicle parameter monitoring.
- Vehicle and tuning data recording.
- Advanced data log analysis.
- Performance estimation tools.
- Integrated help functions.
- Supports available JB4 firmware updates.
- Access to newly released maps and supported features as development continues.
Fitment
Jeep Grand Cherokee (WL74)
- 2026+ Jeep Grand Cherokee 2.0T Hurricane 4 Turbo
- Laredo Altitude
- Limited
- Limited Reserve
- Summit
Jeep Grand Cherokee L (WL75)
- 2026+ Jeep Grand Cherokee L 2.0T Hurricane 4 Turbo
- Laredo Altitude
- Limited
- Limited Reserve
- Summit
Engine Compatibility
Compatible Engine: 2.0L Hurricane 4 Turbo gasoline engine.
Not Compatible With:
- Jeep 3.6L Pentastar V6.
- Jeep 2.0L 4xe plug-in hybrid.
- Other engine configurations not explicitly supported by Burger Motorsports.
Important Fitment Note: This JB4 application is specifically designed for the new 2.0L Hurricane 4 Turbo gasoline engine. Confirm your vehicle's model year, engine designation, ECU configuration, and exact JB4 part number before ordering.
How the JB4 Tuning System Works
The JB4 is an advanced plug-and-play tuning system that installs between selected vehicle sensors and the factory engine control unit (ECU).
Using information gathered through its sensor connections and CANbus integration, the JB4 adjusts supported tuning parameters to increase engine performance without requiring a conventional ECU reflash.
Depending on the vehicle application, these adjustments can involve boost pressure, ignition-related parameters, air-fuel ratio targets, and fuel trims.
This architecture allows the JB4 to provide multiple performance maps, real-time monitoring, and additional control features while working alongside the vehicle's existing engine management system.
Unlike a permanently VIN-locked tuning device, the JB4 can be removed and potentially transferred to another compatible vehicle.
Important Tuning Compatibility & Disclaimers
- Performance gains of up to 60 wheel horsepower and 60 wheel torque are manufacturer claims. Actual results vary depending on fuel quality, vehicle condition, selected map, environmental conditions, and supporting modifications.
- Performance maps require 91-octane or higher fuel unless Burger Motorsports specifies otherwise for a particular calibration.
- Use only fuel blends and tuning maps supported by the manufacturer.
- E85 compatibility does not mean every ethanol concentration is suitable for every vehicle configuration.
- Water/methanol injection functionality requires compatible supporting hardware and proper configuration.
- Confirm current JB4 firmware and map compatibility with your exact ECU software version.
- Factory safety systems are intended to remain operational, but aftermarket tuning cannot guarantee protection against mechanical damage.
- ECU tuning may affect manufacturer warranty coverage, emissions compliance, and vehicle reliability.
- A removable tuning system should not be assumed to be undetectable by vehicle diagnostics or dealership equipment.
- Confirm local emissions and road-use regulations before installation.
- Follow Burger Motorsports installation instructions and monitor vehicle operating parameters when using performance maps.
