Description
The Burger Tuning JB4 Performance Tuner is the most advanced plug-and-play solution for the 2022+ Lexus LX 600 and 2024+ Lexus GX 550 3.5L Twin Turbo platforms. Delivering up to +60whp (+75hp crank) on pump gas with a completely stock setup, the JB4 provides even greater gains when paired with bolt-ons, higher-octane fuel, E85 blends, or upgraded turbos.
No ECU flash is required, and the JB4 works with locked ECUs, making it the ideal upgrade for warranty-conscious owners. Thanks to CANbus OBDII integration, it accesses critical real-time engine data like AFR, knock, boost, and throttle input to apply precision tuning while maintaining safety protocols.
With up to 8 preloaded maps, boost-by-gear control for improved traction, real-time logging, and fault code reading/clearing, the JB4 delivers unmatched versatility. Installation is simple, fully reversible, and leaves no trace when removed.
Features & Benefits
- Gains of up to +60whp (+75hp crank) on stock LX 600 & GX 550
- Works on locked ECUs — no flash required
- Plug & Play installation — no cutting or splicing
- Preloaded with custom Lexus JB4 software and up to 8 adjustable maps
- Ethanol (E85) compatible tuning maps
- Boost-by-gear control in 1st, 2nd, and 3rd for optimized launches
- View and log 20+ engine parameters via JB4 app
- Read and clear fault codes from your phone or tablet
- Built-in safety systems for temp, AFR, knock, and overboost protection
- Runs smoothly as stock during normal driving
- Fuel economy unchanged in daily driving
- Fully reversible and not VIN-locked – resell or move to another car
- Rugged billet aluminum enclosure for durability
- Compatible with JB4 Mobile by DMAC ($29) or JB4PRO (free) wireless adapters
- Made in the USA with a 5-year warranty
Vehicle Fitment
Lexus
- 2022+ Lexus LX 600 3.5L Twin Turbo (BETA)
- 2024+ Lexus GX 550 3.5L Twin Turbo (BETA)
What is a JB4?
The JB4 is a piggyback performance tuner that installs between your vehicle’s sensors and ECU to optimize boost, fueling, and ignition timing for substantial yet safe performance gains.
Unlike a flash tune, the JB4 is fully removable, works on locked ECUs, and offers features such as ethanol mapping, boost-by-gear, fault code reading, and real-time logging. With free firmware and map updates, the JB4 evolves alongside your build, making it the gold standard in modern turbo tuning.
