Description
The Burger Tuning JB4 delivers up to +40whp and +50wtq gains on stock 2.5L Turbo Mazda vehicles including the Mazda 3, 6, CX-5, CX-9, CX-30, and CX-50. This plug-and-play tuner connects to two easily accessible engine sensors and works in harmony with your factory ECU to optimize boost, timing, and fueling for smoother power delivery and reduced turbo lag.
Powered by a 64MHz processor, the JB4 samples sensors 800 times per second with dedicated 10-bit digital-to-analog converters for ultra-smooth tuning precision. Fuel economy remains unchanged during normal driving, and the system is compatible with all factory driving modes.
Features & Benefits
- Up to 40whp and 50wtq power gains on stock 2.5L Turbo Mazda engines
- Improves 0-60 mph acceleration and quarter-mile times
- Preloaded with 8 custom JB4 maps supporting various fuels and modifications
- Compatible with E85 ethanol fuel and includes dedicated ethanol maps
- Boost-by-gear control for optimized launches in 1st, 2nd, and 3rd gears
- Real-time viewing and recording of up to 40 engine parameters via JB4 app
- Ability to read and clear engine fault codes
- Plug-and-play installation — no cutting or splicing required
- CANbus OBDII integration for advanced tuning accuracy and safety
- Runs as smoothly as factory settings, preserving drivability
- Compatible with all factory driving modes
- Fuel economy unchanged during normal operation
- Requires 91 octane or higher for maximum gains
- Not VIN locked, removable without a trace, and transferable to another vehicle
- Rugged billet aluminum enclosure protects the JB4 tuner
- Made in the USA with a 5-year warranty
Vehicle Fitment
- 2021+ Mazda 3 SKYACTIV® 2.5L Turbo
- 2017+ Mazda 6 SKYACTIV® 2.5L Turbo
- 2017+ Mazda CX-5 SKYACTIV® 2.5L Turbo
- 2016+ Mazda CX-9 SKYACTIV® 2.5L Turbo
- 2021+ Mazda CX-30 SKYACTIV® 2.5L Turbo
- 2023+ Mazda CX-50 SKYACTIV® 2.5L Turbo
What is a JB4?
The JB4 tuner is a plug-and-play performance upgrade for turbocharged vehicles that installs between your engine’s sensors and the ECU/DME. It manipulates boost, spark, and fueling parameters in real time using advanced CANbus integration to maximize power while maintaining safe operation and factory-like smoothness.
Unlike flash tunes, the JB4 is fully removable without leaving traces or triggering fault codes and is not VIN locked — making it transferable to other vehicles or resalable. With continuous free firmware updates and new maps, the JB4 has been the gold standard in turbocharged performance tuning for over a decade.
