Description
The Burger Tuning JB4 is the ultimate plug-and-play performance tuner for the 2020+ Cadillac CT4, CT4-V, CT4-V Blackwing, XT5, CT5, and CT5-V.
Expect up to +60hp and +80tq at the wheels on stock models and up to +100whp on the CT4-V Blackwing with higher-octane or E85 blends. The JB4 connects to accessible engine sensors and uses CANbus integration to optimize boost, timing, and fueling based on real-time engine data — delivering smooth, reliable power with factory-like drivability.
Unlike ECU flashes, the JB4 is fully reversible, leaving no trace when removed. With 8 preloaded maps, including stock, valet, pump gas, E85, and race gas tunes, you can change performance levels on the fly via the optional JB4 Mobile App or BMS Data Cable.
Features & Benefits
- +60hp / +80tq gains on stock models
- Up to +100whp on CT4-V Blackwing with supporting fuel
- 8 maps for pump gas, E85, stock, and valet mode
- Ethanol (E85) compatible tuning maps
- Boost-by-gear for optimized launches in 1st–3rd gears
- View & log up to 40 engine parameters in real time
- Read & clear diagnostic fault codes
- Quick plug-and-play installation — no cutting or splicing
- CANbus OBDII integration for advanced tuning and safety
- Maintains stock-like drivability
- Compatible with all driving modes
- Not VIN-locked — transferable between vehicles
- Rugged billet aluminum JB4 enclosure
- Made in USA — 5-year warranty
Vehicle Fitment
Cadillac
- 2020+ CT4 – 2.0L Turbo 4-Cylinder
- 2020+ CT4-V – 2.7L Dual Volute Turbo 4-Cylinder
- 2020+ CT4-V Blackwing – 3.6L Twin Turbo V6
- 2020+ XT5 – 2.0L Turbo 4-Cylinder
- 2020+ CT5 – 2.0L Twin-Scroll Turbo 4-Cylinder
- 2020+ CT5-V – 3.0L Twin Turbo V6
What is a JB4?
The JB4 is a next-generation piggyback ECU tuner for turbocharged vehicles. Installed between your ECU and engine sensors, it adjusts boost, fueling, and timing in real time for maximum performance.
With CANbus integration, the JB4 uses data such as AFR, ignition timing, fuel trims, throttle input, and knock control to deliver safe, consistent power gains. Burger Motorsports provides free firmware updates with new maps and features, keeping your tuner at the forefront of performance technology.
