Description
Unlock the full capability of your 2019+ Chevrolet Silverado 2.7L Turbo with the JB4 Performance Tuner, the most advanced plug-and-play tuning solution available for modern turbocharged trucks. Delivering up to 85 wheel horsepower and 120 lb-ft of torque on a completely stock vehicle, the JB4 significantly improves acceleration, throttle response, towing performance, and overall drivability—without the risks associated with ECU flash tuning.
The JB4 installs easily by connecting to two accessible sensors in the engine bay and works seamlessly with your factory ECU to remap boost, timing, and fueling for optimized performance and reduced turbo lag. Unlike flash tuning, the JB4 leaves no footprint on the ECU, making it fully removable and ideal for warranty-conscious owners.
Advanced CANbus Integration & Real-Time Tuning
Equipped with full CANbus integration, the JB4 reads critical engine data directly from the ECU—including throttle position, pedal input, ignition timing, air/fuel ratios, fuel trims, engine knock, and gear selection. This real-time data allows the JB4 to deliver precise, adaptive tuning that maximizes performance while maintaining engine safety. Compared to basic tuners without CANbus capability, the JB4 offers superior power delivery, control, and reliability.
Versatile Performance for Daily Driving & Towing
The JB4 is fully compatible with all factory driving modes, including towing, and maintains factory-like fuel economy during normal driving conditions. It supports both the original and updated high-output versions of the 2.7L turbo engine, ensuring broad compatibility across Silverado models.
Wireless JB4PRO Connectivity
Included is the JB4PRO Bluetooth adapter and free smartphone app, allowing wireless control via iOS and Android devices. With the JB4PRO app, you can:
- Switch between multiple tuning maps (91, 93, E85, race gas, stock, and valet mode)
- Monitor and log up to 40 engine parameters in real time
- Read and clear fault codes
- Update firmware with free performance improvements and new features
The adapter is integrated within the JB4 enclosure for enhanced durability and a clean, factory-style installation.
Key Features & Benefits:
- Gains of up to 85 WHP and 120 WTQ on a stock truck
- Improves 0-60 acceleration and quarter-mile performance
- Multiple tuning maps for various fuel types and driving conditions
- Quick plug-and-play installation, fully removable, non-VIN locked
- Supports E85 ethanol blends and race fuel
- Reads and clears fault codes; logs up to 40 engine parameters
- Boost-by-gear control for improved traction and launches
- Compatible with the free JB4PRO smartphone app
- Full CANbus integration for real-time ECU-level tuning
- Smooth, factory-like drivability
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for maximum performance
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Compatibility:
- 2019+ Chevrolet Silverado 2.7L Turbo (all variants, including updated high-output models)
Why Choose JB4?
The JB4 is a true plug-and-play performance tuner that delivers ECU-level control without requiring a flash. By integrating directly with sensors and CANbus systems, it safely adjusts boost, timing, air/fuel ratios, and fuel trims in real time. With continuous free firmware updates, advanced safety features, and non-VIN-locked flexibility, the JB4 remains the gold standard in turbocharged performance tuning for both daily driving and demanding applications like towing.
