Description
Take your Toyota GR Yaris or GR Corolla to the next level with the Burger Tuning JB4 Tuner, delivering gains of up to 50whp and 60wtq on a stock vehicle—without the risks of ECU flashing. The JB4 is a plug & play performance upgrade that connects to two easily accessible sensors in the engine bay and works alongside your factory ECU to optimize boost, timing, and fueling for maximum performance and reduced turbo lag.
Featuring a 64mhz processor that samples sensors 800 times per second using advanced 10-bit digital converters, the JB4 ensures smooth, consistent, and powerful performance. Full CANbus integration enables advanced mapping, data logging, and diagnostics, with channels for boost, timing, AFR, fuel trims, throttle, knock control, and more.
Completely removable and undetectable when needed, the JB4 maintains stock-like drivability and fuel economy in normal driving, while delivering exhilarating performance when called upon.
JB4 Features & Benefits
- Gains of up to 50whp and 60wtq on stock vehicles
- Faster 0–60 mph and 1/4 mile times
- Preloaded with custom GR Yaris/GR Corolla maps for various fuels & mods (up to 8 maps)
- Ethanol (E85) compatible tuning maps included
- Reads and deletes fault codes
- Live view & logging of up to 40 engine parameters via JB4 app
- Boost-by-gear control for optimized traction in 1st–3rd gear
- JB4 Mobile compatibility for wireless map switching, tuning, and updates
- More performance, safety, and features than standard chips
- Plug & Play installation with no wire cutting
- CANbus OBDII integration for superior tuning features
- Stock-smooth drivability and compatibility with all driving modes
- No fuel economy loss during normal driving
- 91 octane fuel or better required for performance gains
- Not VIN-locked – easily removable and transferable
- Rugged billet aluminum JB4 enclosure included
- Made in the USA with 5-year extended warranty and free USA shipping
Vehicle Fitment
Toyota:
- 2021+ GR Yaris – Turbocharged 3-cyl
- 2023+ GR Corolla – Turbocharged 3-cyl
What is a JB4?
The JB4 is the industry-leading plug & play tuning solution for turbocharged vehicles. By intercepting and adjusting signals between your engine sensors and ECU, it safely increases performance without overwriting the factory software. With advanced CANbus control, fuel and spark optimization, Bluetooth connectivity, and ongoing firmware updates, the JB4 offers unmatched flexibility and performance. It’s not VIN-locked, fully reversible, and can be resold or moved to another compatible vehicle.
