Description
Unlock the full potential of your Volkswagen or Audi 2.0TSI vehicle with the JB4 Performance Tuner, the most advanced plug-and-play tuning solution for turbocharged engines. Delivering power gains starting at 25 bhp and 50 ft-lb of torque, and up to 60 hp in specific RPM ranges, the JB4 enhances acceleration, responsiveness, and driving enjoyment—all without flashing your ECU.
Plug-and-Play Installation
The JB4 is designed for quick, easy installation and removal, requiring no permanent ECU modifications. With full CANbus integration and advanced tuning features, it provides superior control over boost, timing, and fueling while maintaining factory safety systems.
Key Features Include:
- User-adjustable tuning for peak performance
- Boost-by-gear control for improved traction
- Integrated water/methanol support
- Advanced safety protocols for boost, AFR, fuel trims, and knock detection
- Multiple tuning maps for pump gas, E85, and other fuel types
- Real-time engine data logging and fault code reading/clearing
- Optional exhaust flap control on supported vehicles
Wireless JB4PRO Smartphone Connectivity
The included JB4PRO adapter allows wireless connection to iOS and Android devices, enabling:
- On-the-fly map switching between factory and performance maps
- Advanced diagnostic and performance monitoring
- Firmware updates to unlock new features and improved maps
- Real-time performance analysis and estimation tools
The adapter fits fully inside the billet aluminum JB4 enclosure for maximum protection and a sleek, integrated appearance.
JB4 Features & Benefits
- Up to 60 hp gain on a stock vehicle
- Improved 0-60 mph and quarter-mile times
- Quick, fully removable plug-and-play installation
- Full CANbus integration for advanced tuning and safety
- Reads and clears fault codes, monitors up to 40 engine parameters
- Smooth, stock-like drivability
- Compatible with all driving modes
- Fuel economy unaffected during normal driving
- Requires 91 octane or higher for performance gains
- Not VIN locked and transferable to another vehicle
- Billet aluminum enclosure for durability
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
Volkswagen:
- 2009-2013 VW MK6 Golf GTI
- 2009-2013 VW MK6 Golf R
- 2009-2013 VW MK6 Jetta GLI (pre-2013.5)
- 2009-2017 VW CC
- 2009-2013 VW Tiguan 5N MK1 & 2
Audi:
- 2009-2013 Audi S3 8P
What is a JB4?
The JB4 is a plug-and-play tuner for turbocharged vehicles that installs between your car’s sensors and ECU. Using CANbus and advanced sensor monitoring, it safely manipulates boost, timing, AFR, and fuel trims to deliver significant performance gains. Unlike other tunes, the JB4 requires no permanent ECU modifications, is not VIN locked, and can be removed or transferred between vehicles.
Is the JB4 a real tune?
Absolutely. The JB4 actively adjusts engine parameters in real time for smooth, safe, and substantial horsepower and torque gains—comparable to an ECU reflash, but without the risks or complications.
