Description
Upgrade your Mazda 3.3L Turbo vehicle with the JB4 Performance Tuner, delivering up to 70whp and 60wtq on a factory-stock setup. Designed as a plug-and-play solution, the JB4 connects directly to two accessible engine sensors, working seamlessly with your factory ECU to optimize boost, timing, and fueling for maximum performance and reduced turbo lag.
Equipped with a 64MHz processor, sensors are sampled 800 times per second via dedicated 10-bit digital-to-analog converters, ensuring smooth and reliable power delivery. Unlike flash-based tunes, the JB4 installs discreetly and removes without a trace, preserving factory operation and fuel economy.
Advanced CANbus Integration
The JB4 leverages a plug-and-play OBDII CANbus connection to access critical engine data, including:
- Pedal and throttle position
- Timing advance and air/fuel ratio
- Engine knock monitoring
- Fuel trims
This advanced access enables dynamic tuning algorithms, smoother partial-throttle performance, boost-by-gear control, and additional safety systems such as overboost and lean-run protection. It also allows real-time logging, fuel experimentation, and E85 support, with features continuously enhanced via free firmware updates.
JB4PRO Wireless App Connectivity
The JB4 now includes the JB4PRO adapter and free smartphone app, allowing you to:
- Monitor engine performance and tuning data in real time
- Switch and customize JB4 performance maps
- Update firmware with free maps and new features
- Analyze logs and optimize your setup
The adapter is fully enclosed for weather protection and a sleek, integrated appearance.
Key Features & Benefits
- Gains of up to 70whp and 60wtq on a stock vehicle
- Improves 0-60 mph acceleration and quarter-mile times
- Multiple performance maps for different fuel types
- Quick plug-and-play installation; fully removable
- Supports E85 ethanol blends
- Reads and deletes fault codes; logs up to 40 engine parameters
- Boost-by-gear control for enhanced traction
- Controls exhaust flap operation on supported vehicles
- Full CANbus integration for advanced safety and smooth operation
- Compatible with all driving modes
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for optimal gains
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
Mazda:
- 2024+ CX-90 SKYACTIV® 3.3L Turbo
- 2024+ CX-60 SKYACTIV® 3.3L Turbo
- 2025+ CX-70 SKYACTIV® 3.3L Turbo, including Turbo S
Why JB4?
The JB4 is a true plug-and-play performance tuner for turbocharged vehicles. By interfacing directly with engine sensors and CANbus data, it safely modifies boost, timing, and fuel trims without altering your ECU or triggering fault codes. Fully non-VIN locked, the JB4 can be removed, transferred, or resold, offering reliable, smooth, and significant performance gains while preserving factory safety systems. For over a decade, JB4 has been the gold standard in turbocharged vehicle tuning, trusted in 67+ countries worldwide.
