Description
Unlock the true performance potential of your 2021+ Ford Bronco or Bronco Raptor with the advanced JB4 Performance Tuner. This plug-and-play tuning system delivers up to 100 wheel horsepower and 120 lb-ft of torque gains on stock vehicles—without the risks or permanence of ECU flashing.
Engineered for precision and reliability, the JB4 enhances boost pressure, ignition timing, and fueling, resulting in improved throttle response, reduced turbo lag, and significantly stronger acceleration both on and off-road.
Plug-and-Play Power with Zero ECU Footprint
The JB4 installs quickly by connecting to two easily accessible sensors in the engine bay, working in harmony with your factory ECU. Unlike traditional flash tuning, the JB4 leaves no permanent footprint, allowing it to be removed at any time without detection.
Fuel economy remains unchanged during normal driving conditions, and the system is fully compatible with all factory driving modes, including towing and off-road settings. The JB4 also features auto engine detection, making it compatible with 2.3L, 2.7L, and 3.0L turbocharged engines.
Advanced CANbus Integration for Real-Time Performance
The JB4 stands apart with its integrated OBDII CANbus connection, allowing it to read and process critical engine data directly from the ECU in real time, including:
- Throttle and pedal position
- Ignition timing and fuel trims
- Air/fuel ratio (AFR)
- Engine knock and load
- Boost levels and gear position
This advanced data processing enables adaptive tuning strategies, improved safety systems, and smooth, consistent power delivery far beyond basic tuning solutions.
Multiple Performance Maps for Every Driving Style
The JB4 includes a variety of pre-configured maps designed for different fuel types and performance goals:
- Map 0: JB4 disabled (stock performance)
- Map 1: +3.5 PSI (91+ octane, daily driving)
- Map 2: +3.5 PSI (more aggressive mid/top-end performance)
- Map 3: +4 PSI (optimized for 93+ octane or modified vehicles)
- Map 4: +6 PSI (recommended for E30/E85 blends)
- Map 5: +7 PSI (E85 blends or race fuel)
- Map 6: Fully customizable user-defined tuning
- Map 7: Water/Methanol Injection (WMI) tuning
Wireless JB4PRO Smartphone Integration
Included with your JB4 is the JB4PRO Bluetooth adapter, enabling seamless wireless control via iOS and Android devices. The JB4PRO app allows you to:
- Switch performance maps instantly
- Monitor and log real-time engine data
- Analyze performance and diagnostics
- Update firmware with the latest features and tuning improvements
The adapter is fully integrated within the JB4 enclosure for enhanced durability and a clean, factory-style appearance.
JB4 Features & Benefits
- Up to 100 WHP / 120 WTQ gains (2.7L platform)
- Improved 0–60 mph times and overall acceleration
- Multiple tuning maps for pump gas, E85, and race fuel
- Quick plug-and-play installation
- Boost-by-gear control for improved traction
- Advanced safety systems (overboost, lean protection, knock detection)
- Reads and clears diagnostic trouble codes
- Logs up to 40 engine parameters
- Full CANbus integration for precision tuning
- Smooth, factory-like drivability
- Compatible with all driving modes, including towing
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for performance gains
- Not VIN locked and fully removable
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- Backed by a 5-year warranty
Vehicle Fitment
- 2021+ Ford Bronco 2.3L Turbo
- 2021+ Ford Bronco 2.7L Turbo
- 2022+ Ford Bronco Raptor 3.0L V6 Turbo
What is a JB4?
The JB4 is a plug-and-play performance tuning system designed for turbocharged vehicles. It installs between your vehicle’s sensors and ECU, enabling real-time adjustments to boost, ignition timing, and fueling for significant power gains. With advanced CANbus integration, smartphone connectivity, and ongoing firmware updates, the JB4 delivers industry-leading performance without permanent ECU modification.
Is the JB4 a Real Tune?
Yes. The JB4 actively monitors and adjusts engine parameters using real-time ECU data, delivering safe, smooth, and substantial horsepower and torque gains comparable to ECU flash tuning—without unlocking or permanently altering your ECU.
