The JB4 tuning box for the Lexus LS 500 (2018-2024, 3.5L V6 twin turbo) delivers up to 60hp at the wheels on standard pump petrol - no ECU flash, no coding, no VIN lock.
Plug-and-play fit in under 30 minutes; fully reversible, zero impact on factory warranty.
8 switchable maps via dash button - including ethanol-safe options for E85 or high-octane fuel.
Built-in OBDII fault code read/delete, real-time data logging, and boost-by-gear control.
Optional Bluetooth + JB4PRO app for iOS/Android: monitor 20+ parameters and update firmware remotely.
Rugged USA-made billet aluminium housing, 5-year warranty - engineered for UK fast-road and track-day use.
