Description
The Burger Tuning JB4 Performance Tuner is the ultimate plug-and-play power upgrade for the 2020–2026 Toyota GR Supra Mk5. Delivering up to +80whp (+100hp crank) on pump gas for the B58, the JB4 enhances boost, fueling, and timing for maximum performance — all while retaining stock-like smoothness and reliability. Gains are even higher with bolt-ons, E85 blends, or upgraded turbos.
Unlike ECU flashes, the JB4 is fully reversible, works on locked ECUs, and installs in minutes with no permanent changes. Thanks to CANbus OBDII integration, it accesses real-time engine data like throttle input, AFR, timing, and knock to dynamically adjust performance while maintaining safety limits.
The JB4 comes preloaded with up to 8 maps for various fuels and mods, supports boost-by-gear control for better traction, and offers advanced features such as progressive water/methanol injection support, optional direct EWG control to prevent throttle closure with aftermarket exhausts, and exhaust flap management.
Optional fuel pressure connection allows direct control of fuel trims — ideal for E85 users. Map and setting changes can be made via the JB4 Mobile app or JB4PRO wireless adapter.
Features & Benefits
- Gains of up to +80whp on a stock Supra B58 (up to +100hp crank)
- Works on locked ECUs — no flash required
- Plug & Play installation – no cutting or splicing
- Preloaded with Supra-specific JB4 software and up to 8 adjustable maps
- Ethanol (E85) compatible tuning
- Boost-by-gear control for optimized traction
- View & log 40+ engine parameters via the JB4 app
- Read and clear fault codes from your mobile device
- Supports progressive water/methanol injection and optional direct EWG control
- Exhaust flap operation control in most applications
- Built-in safety protocols for temp, AFR, knock, and boost
- No impact on fuel economy during normal driving
- Fully reversible and not VIN-locked – move to another car or resell later
- Rugged billet aluminum enclosure for durability
- Compatible with JB4 Mobile by DMAC ($29) or JB4PRO (free) for wireless tuning
- Designed and assembled in the USA with a 5-year warranty
Vehicle Fitment
Toyota GR Supra Mk5
- 2020–2026 GR Supra B58 3.0L I6
- 2020–2026 GR Supra B48 2.0L I4
What is a JB4?
The JB4 is a plug-and-play piggyback tuner that connects between your Supra’s sensors and ECU, modifying boost, fueling, and ignition timing dynamically for safe and substantial performance gains.
Through CANbus integration, it reads critical data and applies advanced tuning strategies, offering features like ethanol mapping, boost-by-gear, in-dash gauge options, and on-the-fly map switching.
Unlike flash tunes, the JB4 can be removed at any time without leaving a trace — making it ideal for leased cars or those under warranty. With free firmware and map updates from Burger Motorsports, the JB4 evolves with your build, making it the gold standard in modern turbocharged tuning.
