Unlock serious performance from your 2023 onward Nissan Z 3.0T with the JB4 plug and play performance tuner from Nforcd. Working alongside the factory ECU, the JB4 safely raises boost targets while allowing the ECU to manage timing and fuelling, delivering stronger acceleration, reduced turbo lag and stock-like drivability. On a standard car, gains of up to 100hp and 120 lb ft at the wheels are achievable with suitable fuel.
- Up to +100hp and +120 lb ft at the wheels on a stock Nissan Z with appropriate fuel
- Direct plug-in install to two engine bay sensors with no ECU flashing, fully reversible and not VIN locked
- Advanced 64 MHz processor samples sensors 1000 times per second using dedicated 10 bit converters for smooth, consistent power
- OBDII CANbus integration enables data logging, boost by gear, fault code read and delete, and on the fly map switching
- Preloaded with custom JB4 mapping and up to 8 selectable maps for different fuel grades and hardware, including ethanol E85 compatible maps
- Optional fuel control wires for AFR adjustment and fine tuning when required
- Pair with the optional JB4 PRO Bluetooth module and free JB4PRO app to view and record up to 40 parameters, update firmware and adjust settings from your smartphone
- Quicker 0 to 60 mph and quarter mile potential while retaining factory safety systems
- Compatible with all driving modes and typically no change to fuel economy during normal driving
- 91 octane fuel or higher required for performance gains. Higher octane allows higher boost and larger gains
- Rugged billet aluminium enclosure. Made in the USA with a 5 year warranty
Vehicle fitment: 2023+ Nissan Z 3.0L turbo, including Nismo.
The JB4 is a sophisticated piggyback tuning module that intercepts and optimises key sensor signals rather than reflashing the ECU, giving you significant power and torque increases without unlocking or flagging the control unit. It installs quickly, runs as smoothly as stock and can be removed at any time.
Order your JB4 for Nissan Z from Nforcd today. Professional fitting and setup are available at Nforcd in Warwickshire. To request a fitting quote, email Sales@nforcd.com.




