Unlock serious performance from your Porsche 911 with the JB4 Tuner for 992 and 992.2 Carrera, Carrera S, Carrera T and Carrera GTS. This plug-in piggyback tuner works alongside the factory ECU to optimise boost, timing and fuelling for sharper throttle response, reduced turbo lag and impressive gains of up to 60 hp and 80 lb ft at the wheels on a stock car. Available from Nforcd, it is a popular, reversible upgrade that keeps everyday drivability intact.
- Plug and play tuning box for Porsche 992 and 992.2 Carrera models that integrates with factory ECU strategies
- Up to 60 hp and 80 lb ft to the wheels on a standard vehicle while retaining OEM safety systems and drive modes
- Full SENT sensor support and CANbus integration for advanced data, control and safety strategies
- Built-in safeguards including reduced boost until oil and coolant are up to temperature and automatic low-boost fallback if overheating, lean running, knock or overboost is detected
- Ethanol blend fuel control with E85 compatible mapping options
- Preloaded performance maps with on-the-fly switching, data logging and firmware updates via the optional JB4PRO smartphone app and Bluetooth connection
- Discreet installation, not VIN-locked, and removable without a trace; fuel economy unchanged during normal driving
- Rugged billet aluminium enclosure, designed and assembled in the USA, with a 5 year warranty
Vehicle compatibility
- Porsche 911 992 and 992.2 Carrera
- Porsche 911 992 and 992.2 Carrera S
- Porsche 911 992 and 992.2 Carrera T
- Porsche 911 992 Carrera GTS
Note: Not compatible with the 992.2 Carrera GTS T 3.6L single turbo.
Nforcd knows JB4 inside out and we stock this upgrade for fast dispatch in the UK. Want it fitted? Professional installation is available at Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.




