Description
Unlock up to 70whp and 60wtq on your Mazda 3.3L Turbo with the JB4 Performance Tuner – a true plug-and-play solution for turbocharged vehicles. Designed to work seamlessly with your factory ECU, the JB4 remaps boost, timing, and fueling to deliver smooth, powerful performance and reduce turbo lag.
Featuring a 64MHz processor that samples sensors 800 times per second via 10-bit digital-to-analog converters, the JB4 ensures precision tuning and consistent power delivery. Now equipped with the JB4PRO adapter and free app, you can wirelessly monitor and adjust your vehicle on the go.
Seamless Installation & Discreet Operation
The JB4 installs quickly and discreetly, with no splicing or cutting of factory wires. Unlike traditional flash tunes, it removes completely without a trace, leaving your vehicle stock when needed. Fuel economy during normal driving remains unaffected, and the JB4 is compatible with all driving modes.
Advanced CANbus Integration
The JB4 uses a plug-and-play OBDII CANbus connection to access critical engine data directly from the ECU, including:
- Pedal and throttle position
- Timing advance
- Air/fuel ratio
- Fuel trims
- Engine knock
This advanced integration allows for dynamic real-time tuning, smoother partial-throttle performance, boost-by-gear traction control, and enhanced safety systems such as lean-run and overboost protection. Additional features include multiple fuel maps, advanced logging, and support for E85 ethanol mixtures.
JB4PRO Wireless Connectivity
The included JB4PRO smartphone adapter connects wirelessly to iOS or Android devices, giving you:
- Real-time performance monitoring and logging
- On-the-fly map switching and tuning adjustments
- Free firmware updates with new features
- Advanced log analysis for tuning optimization
The adapter is fully enclosed for weather protection and a streamlined, integrated appearance.
Features & Benefits
- Up to 70whp and 60wtq on a factory vehicle
- Improves 0-60 mph and quarter-mile times
- Multiple tuning maps for various 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 improved traction
- Controls exhaust flap operation on supported vehicles
- Full CANbus integration for advanced tuning and safety
- Compatible with all driving modes
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for peak performance
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
- 2024+ Mazda CX-90 SKYACTIV® 3.3L Turbo
- 2024+ Mazda CX-60 SKYACTIV® 3.3L Turbo
- 2025+ Mazda CX-70 SKYACTIV® 3.3L Turbo, including Turbo S
What is a JB4?
The JB4 is a plug-and-play performance tuner for turbocharged vehicles that installs between your sensors and the DME/ECU. By tapping into critical engine data and CANbus signals, the JB4 safely increases boost, timing, and fuel delivery, achieving performance gains similar to an ECU flash without ever altering your ECU. Fully non-VIN locked, the JB4 can be removed, transferred to another vehicle, or resold.
Trusted in 67+ countries worldwide, the JB4 has set the standard for reliable, high-performance plug-and-play tuning for over a decade.
Is the JB4 a real tune?
Absolutely. By leveraging CANbus and sensor data, the JB4 adjusts your vehicle’s boost, timing, AFR, and fuel trims in real time, providing safe, smooth, and substantial power gains while retaining factory safety systems – all without unlocking or flashing your ECU.
