The most advanced plug-and-play tuning system for your 2022+ Lexus LX 600 and 2024+ Lexus GX 550 3.5L twin turbo — up to 75 crank horsepower on pump gas with no flash, no unlock, and no risk to your factory warranty systems.
✅ Fitment: 2022+ Lexus LX 600 3.5L Twin Turbo (BETA) • 2024+ Lexus GX 550 3.5L Twin Turbo (BETA). Same 3.5L V35A twin-turbo platform as the Toyota Tundra / Land Cruiser / Sequoia.
Real Power, No Flash Required
The JB4 taps into your engine's sensors and CANbus to safely add boost, adjust timing, and dial in fueling in real time — a similar result to an ECU reflash, but without the vehicle ever knowing it's been tuned.
Gains climb even higher with bolt-ons, higher octane, or E85 blends. Runs as smoothly as stock, works with every drive mode, and has no impact on fuel economy during normal driving.
JB4 PRO Bluetooth — Included
The all-new JB4 PRO adapter fits fully inside the JB4 enclosure and wirelessly connects to your iOS or Android device. Record and analyze data, switch performance maps on the fly, and pull free firmware updates as BMS releases more powerful maps and new features.
The JB4PRO Free app adds an intuitive interface, help buttons, and advanced log-analysis tools that estimate performance and flag any tuning concerns.
Dyno & Real-World Results
3.5L twin-turbo results shown on the shared Toyota platform (same V35A engine).
A Decade of Proven Tuning
The JB4 has been the gold standard in plug-and-play turbocharged tuning for over a decade, sold in 67+ countries. Often imitated, never duplicated — with more advanced connection points, full CANbus integration, fuel & spark control, and Bluetooth logging no other piggyback can match.
Optional JB4 MAP Sensor Bypass Extensions let you bypass the hard-to-reach upper rear MAP sensor, making JB4 installation and removal far easier. Sold as a pair.
FAQ
Is the JB4 a real tune? Yes. It alters boost, timing, AFR, and fuel trims in real time via your sensors and CANbus — real, meaningful gains without unlocking or flagging your ECU.
Will it work with my locked ECU? Yes. No ECU flash is needed and the JB4 is fully compatible with locked ECUs.
Is it reversible? Completely. The JB4 is not VIN-locked — remove it any time, swap it between cars, or resell it later.
What octane do I need? 91 octane or better is required for the performance gains. E85 blends are supported for even more.
Do I need the app? No setup is required to run it, but the included JB4 PRO Bluetooth adapter + free app let you log data, switch maps, and update firmware.
What's the warranty? 5 years from Burger Motorsports. Designed and assembled in the USA.
