Unlock responsive, reliable power from your 2023+ Toyota Highlander, Crown or Vellfire 2.4L turbo with the JB4 plug and play tuner from Nforcd. Designed as a sophisticated piggyback ECU upgrade, the JB4 delivers proven gains of up to 40 hp at the wheels (around 55 hp at the crank) on a stock vehicle running premium petrol, all without flashing the ECU and fully compatible with locked ECUs.
- No ECU flash required plug and play harness for quick install and removal, works with locked ECUs
- Up to 40 whp on a stock car with premium fuel, helping improve 0-60 and quarter-mile performance
- Preloaded performance maps with on-the-fly switching, including ethanol E85 compatible options
- Built-in data logging and fault code read/clear, plus boost by gear and progressive water/methanol support
- Optional Bluetooth smartphone connectivity via JB4 PRO app to monitor up to 40 parameters, adjust maps and update firmware
- Not VIN locked, supplied in a rugged billet aluminium enclosure, made in the USA with a 5-year warranty
The JB4 integrates via CANbus OBDII for smooth, factory-like drivability and works across all driving modes. Fuel economy remains unchanged during normal driving, and no additional modifications are required to enjoy the performance benefits.
Vehicle fitment
Toyota Highlander 2023+ 2.4L 4-cyl turbo LE, XLE, XSE
Toyota Crown 2023+ 2.4L 4-cyl turbo XLE, Limited, Platinum
Toyota Vellfire 2023+ 2.4L 4-cyl turbo
Nforcd knows the JB4 well and it continues to be a popular Toyota 2.4 turbo tuning upgrade for customers seeking safe, repeatable gains with easy reversibility. Order online today, or if you prefer professional installation, fitting is available at Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.