Description
for the 2.9L 6-cylinder twin-turbo engine. Achieve up to 80 horsepower to the wheels on a completely stock vehicle running pump gas, with even higher gains possible using bolt-on modifications, higher-octane fuel, or larger turbochargers. The JB4 is plug-and-play, requires no ECU flash, and is fully compatible with locked ? ECUs.
Advanced Plug-and-Play Installation
The JB4 includes a simple, high-quality harness for fast installation and removal. Unlike traditional flash tunes, the JB4 provides advanced tuning features with no permanent ECU modification. Key capabilities include:
- On-the-fly map switching between factory and performance modes via smartphone or tablet
- Boost-by-gear control for improved traction in lower gears
- Progressive water/methanol injection support
- Built-in data logging and real-time engine parameter monitoring
- Fault code reading and clearing
- Optional exhaust flap control
Wireless JB4PRO Smartphone Connectivity
The included JB4PRO Bluetooth adapter allows wireless connection to iOS and Android devices, enabling:
- Real-time performance monitoring and data logging
- Map selection and firmware updates
- Advanced diagnostic tools and performance estimation
- Intuitive, easy-to-use interface with built-in help features
The adapter fits fully inside the billet aluminum JB4 enclosure for enhanced protection and a streamlined appearance.
Key Features & Benefits
- Up to 80 wheel horsepower on stock Alfa Romeo Quadrifoglio QV
- Improved 0-60 mph and quarter-mile times
- Multiple tuning maps for pump gas, E85, and other fuel types
- Quick plug-and-play installation, fully removable
- Reads and deletes fault codes
- Monitors up to 40 engine parameters in real time
- Boost-by-gear control for optimized traction
- Exhaust flap control on supported vehicles
- Full CANbus integration for advanced tuning and safety
- Smooth, stock-like drivability
- Compatible with all driving modes
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for performance gains
- Not VIN locked, transferable between vehicles
- Rugged billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
- 2017+ Alfa Romeo Giulia Quadrifoglio 2.9L 6-cylinder twin turbo
- 2017+ Alfa Romeo Stelvio Quadrifoglio 2.9L 6-cylinder twin turbo
Why Choose JB4?
The JB4 is a real, plug-and-play performance tuner that actively adjusts boost, timing, air-fuel ratios, and fuel trims using real-time engine data via CANbus. This delivers ECU-level performance gains without permanently modifying your ECU. With smartphone connectivity, ethanol compatibility, and continuous firmware updates, the JB4 remains the gold standard in Alfa Romeo turbocharged tuning worldwide.
