Description
JB4 Performance Tuner for BMW S63 — F90 M5/M5C/M5 CS, F91–F93 M8, F95 X5M, F96 X6M
Unleash the full potential of your S63-powered BMW with the JB4 Performance Tuner, the most advanced plug-and-play tuning solution available for modern M vehicles. Engineered specifically for the S63 twin-turbo V8, the JB4 dramatically increases horsepower, torque, and throttle response while maintaining factory-like drivability and complete ECU safety protections.
Equipped with fully customizable tuning maps, real-time engine parameter logging, and seamless CANbus integration, the JB4 delivers superior performance whether your vehicle is stock or heavily modified. From enhanced acceleration to E85-compatible maps and smartphone-based control, the JB4 stands as the industry’s gold standard for turbocharged BMW tuning.
Key Features & Performance Benefits
-
Gains up to 80whp and 100wtq on a completely stock S63 engine
-
Noticeably faster 0–60 mph and quarter-mile performance
-
Preloaded with S63-specific tuning software and up to 8 maps for pump gas, bolt-ons, race fuel, or ethanol blends
-
E85-compatible maps for maximum power potential
-
Ability to read and clear fault codes directly from the tuner
-
Monitor and record 40+ real-time engine parameters using the JB4PRO mobile app
-
Boost-by-gear control for improved traction and optimal launches
-
Full compatibility with the JB4PRO smartphone app for logging, map adjustments, and wireless control
-
Provides superior performance, safety, and refinement compared to generic “chip tunes”
-
True plug-and-play installation—no cutting, splicing, or ECU unlocking
-
Advanced CANbus OBDII integration for unparalleled tuning precision and safety
-
Factory-smooth drivability with unchanged fuel economy during normal driving
-
Works with all factory driving modes including Comfort, Sport, and Sport+
-
91+ octane recommended for power gains
-
Not VIN-locked—remove anytime without a trace and resell later
-
Comes in a rugged billet aluminum enclosure for maximum durability
-
Designed and assembled in the USA
-
Backed by a 5-year warranty
Vehicle Fitment
BMW M5 (F90) — 2018+
-
M5
-
M5 Competition
-
M5 CS
BMW M8 (F91–F93) — 2020+
-
M8 Coupe
-
M8 Competition
-
M8 Convertible
-
M8 Gran Coupe
BMW X Series (S63) — 2020–2023
-
X5M (F95) and X5M Competition
-
X6M (F96) and X6M Competition
What Is the JB4?
The JB4 is the most advanced plug-and-play tuner available for turbocharged engines. Installed between the vehicle’s sensors and the factory DME/ECU, it safely modifies boost, timing, and fuel parameters to deliver significantly increased performance.
Unlike basic tuning modules, the JB4 uses high-resolution CANbus data, ignition and fuel trimming adjustments, smartphone Bluetooth integration, and constantly updated firmware to achieve superior performance. It does all of this without unlocking or permanently altering your factory ECU, allowing full reversibility and total peace of mind. With over 67 countries using the platform, the JB4 remains the world’s most trusted tuning solution for modern turbocharged BMWs.
Is the JB4 a Real Tune?
Yes — the JB4 provides tuning capabilities comparable to a full ECU reflash. By reading and adjusting real-time CANbus data, it precisely alters boost levels, timing, air-fuel ratios, and fuel trims while preserving all factory safety systems and ECU protections. The result is smooth, safe, and substantial power gains with complete stealth and reversibility, making it the ideal tuning solution for the S63 engine.
