Description
Transform your BMW’s performance with the JB4, the most advanced plug-and-play tuning system for B58-powered vehicles. Achieve up to 120whp and 120wtq gains on a stock setup, with even greater improvements when paired with bolt-ons, E85 mixtures, or upgraded turbos. Unlike traditional ECU flashing, the JB4 offers these power gains safely and without risk, retaining the flexibility to revert to stock settings anytime.
Exclusive JB4 Features
The JB4 stands out from competitors with a host of premium features, including:
- In-dash map switching: Seamlessly toggle between factory settings and performance maps while driving.
- Real-time data monitoring: View and log up to 40 engine parameters using the JB4 Mobile app.
- Boost-by-gear control: Optimize traction by tailoring boost levels for each gear.
- Advanced tuning compatibility: Support for ethanol blends (E85), water/methanol injection, and aftermarket exhausts.
- Error code management: Read and delete fault codes directly from the JB4.
- Exhaust flapper control: Customize sound and performance at your fingertips.
Effortless Plug & Play Installation
The JB4 system features a straightforward installation process that doesn’t require permanent modifications to your BMW. It integrates directly with your car's CANbus system for precise tuning, ensuring smooth operation across all driving modes. The JB4 is fully reversible, allowing you to uninstall without leaving a trace on your ECU.
JB4 Tuning Maps
Choose from preloaded performance maps tailored for various fuels and setups:
- Map 0: Stock tuning (JB4 disabled)
- Map 1: +3 psi boost (91 octane)
- Map 2: +4 psi boost (91-93 octane)
- Map 3: +6 psi boost (93+ octane)
- Map 4-7: Advanced maps for E85 blends, WMI, and custom tuning
- Map 8: Valet mode (low boost)
Why Choose JB4 for Your BMW B58?
The JB4 goes beyond conventional chip tunes, offering unparalleled functionality, safety, and performance. Whether you're seeking faster 0-60 times, better 1/4 mile results, or an all-around exhilarating driving experience, the JB4 delivers. Additional benefits include:
- Compatible with JB4 Mobile for iOS and Android
- No VIN lock – transfer or resell with ease
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- Includes a 5-year warranty
Vehicle Compatibility
The JB4 is engineered for GEN1 and GEN2 BMW B58 engines, including these models:
- BMW 1 Series: M140i (F20, F21)
- BMW 2 Series: M240i (F22, F23, G42)
- BMW 3 Series: M340i (F30, G20, G21)
- BMW 4 Series: M440i (F32, G22, G23, G26)
- BMW 5 Series: 540i (G30)
- BMW X Series: X3, X4, X5, X6, X7 (B58 variants)
- BMW Z4: Z4 M40i (G29)
For vehicles with the latest GEN3 B58TU2 engine, visit the [JB4 GEN3 product page].
Optimize Performance with JB4 Mobile
Pair your JB4 tuner with the optional JB4 Mobile Connect Kit for seamless Bluetooth control via iOS or Android. Adjust maps, monitor performance metrics, and update firmware with ease. Alternatively, connect using the BMS Data Cable for a laptop-based interface.
Order Now and Experience the Gold Standard in BMW Tuning
With its industry-leading technology, CARB approval, and decades of innovation, the JB4 remains the ultimate choice for turbocharged performance enthusiasts. Enjoy free USA shipping and a worry-free 5-year warranty with every purchase.
Take your BMW to the next level today.
