Unlock serious performance from your Lexus with the JB4 plug and play tuning box for the 3.5L twin turbo LX 600 and GX 550. This BETA JB4 delivers gains of up to 60hp at the wheels on a stock car on pump fuel, roughly 75hp at the crank, without flashing the ECU. Enjoy rapid, factory-smooth power with on-the-fly map switching and advanced safety built in. Supplied in the UK by Nforcd.
- Up to 60whp gains on a stock vehicle on pump fuel, around 75hp at the crank
- No ECU flash required and compatible with locked ECUs for hassle-free fitting
- Preloaded JB4 Lexus mapping with up to 8 selectable maps, including E85-compatible options
- In-dash map switching, boost by gear control and seamless factory-like drivability
- Integrated data logging and fault code read/clear, with optional Bluetooth app or BMS data cable
- Not VIN-locked, easily removable, rugged billet aluminium enclosure, made in the USA with a 5 year warranty
The JB4 interfaces via advanced CANbus OBDII integration to adjust boost, timing and fueling while retaining the vehicle’s factory safety systems. It works brilliantly as a first and only modification, and also scales with further bolt-ons, higher octane fuel, E85 blends and larger turbos.
Vehicle fitment
2022+ Lexus LX 600 3.5L Twin Turbo BETA
2024+ Lexus GX 550 3.5L Twin Turbo BETA
Fuel requirement: 91 octane or better recommended for performance gains.
Nforcd knows this product well and it has been a popular choice for Lexus twin turbo owners seeking a fast, reversible upgrade. Need professional fitting? Nforcd offers fitting in Warwickshire. Request a quote at Sales@nforcd.com and transform your Lexus with confidence.