JB4 Performance Tuner for Mercedes-Benz C63, E63, GT, GLC, Including S models is available through Speedzone Performance. Review the fitment, included parts and installation requirements below, then choose the exact option for your vehicle.

Power gains of up to +100whp and +100wtq to your AMG

The JB4 is simply the most powerful and feature-rich tuning system available for your AMG. Using the same technology as our advanced tuning systems for the BMW M3 and M5 models, our new AMG C63 system delivers factory smooth performance increases in a package that can be installed or removed in under an hour.

Now includes the JB4PRO adapter and free app built in!

The JB4 includes many features not found on other competitive AMG tuning products including:

Fuel control to ensure safe operation at higher power levels. CANbus allowing the JB4 to monitor and integrated advanced engine data for unparalleled perforation and safety. Performance maps for pump fuels, E85 mixtures, race fuels, WMI, and even a lower than stock performance VALET map, all selectable on the fly via the optional JB4 mobile phone app.

With JB4 Mobile you can also datalog to your phone, enter setting or custom map changes, update the firmware to unlock new features and maps as we add them, read or delete fault codes, measure your 0-60 time, and much more.

In addition, the JB4 includes many useful racing features not found on any other system including user-adjustable boost by gear to improve traction off the line.

The JB4 is compatible with both C63 and C63S models and is not VIN locked so it can be moved to your next vehicle or resold, and is made in the USA.

Optional BCM (Boost Control Module)

The JB4 attaches to the manifold TMAP, charge pipe MAP, and fuel pressure connections on each side of the engine, for six total connection points plus OBDII for CANbus. These fundamental attachments provide the JB4 with a wide range of tuning adjustments.

For vehicles targeting very high boost levels using heavy bolt modifications, WMI, larger turbos, and/or very high octane, additional wastegate dutycycle may be beneficial in driving boost up to the higher target. To increase wastegate dutycycle the BCM add on harness is required. Although not currently available it will be $199 and plugs into the JB4 harness and the boost control solenoid under the vehicle for direct wastegate control.

For a full map listing, firmware details, and more, join the discussion here:

https://www.jb4tech.com/forums/showthread.php?t=55094

Wirelessly Connect to your JB4: Grab our all-new JB4 PRO smartphone connection to wirelessly connect the JB4 BMW tuner to your Bluetooth 4.0 compatible iOS or Android device.

This option allows you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development.

Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look.

The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns.

For more info on how to use the JB4PRO free app click here.

JB4 Features & Benefits

• Power gains of up to 100hp and 100tq to the wheels on a stock vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 Mercedes tuning software and up to 8 maps for various fuel and modification levels
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• View and record up to 40 different gauges/engine parameters in real-time with the JB4PRO app
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4PRO app for a perfect launch
• Exhaust flap operation can be controlled in most JB4 applications
• Compatible with the FREE JB4PRO app for logging, tuning changes, and adjustment
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• CANbus OBDII integration offering unrivaled tuning features and performance
• Improved performance over non-integrated chip tunes
• Runs as smoothly as stock. This is how your vehicle should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• 91 octane fuel or better required for performance gains
• Not VIN locked and can be removed without a trace and resold down the road
• Includes the rugged JB4 billet aluminum enclosure for protection
• Designed and assembled in the USA
• 5-year warranty

Vehicle Fitment (M177/M178)

C-Class
• 2015-2021 Mercedes-AMG C63 & C63 S (W205) - M177

E-Class
• 2017-2023 Mercedes-AMG E63 & E63 S (W213) - M177

GLC
• 2018-2022 Mercedes-AMG GLC63 & GLC63 S (X253/C253) - M177

AMG GT 4-Door
• 2019-2024 Mercedes-AMG GT 63 & GT 63 S (X290) - M177

AMG GT 2-Door
• 2015-2021 Mercedes-AMG GT & GT S (C190/R190) - M178
• 2017-2021 Mercedes-AMG GT C & GT R (C190/R190) - M178
• 2020-2021 Mercedes-AMG GT R Pro (C190) - M178
• 2021-2022 Mercedes-AMG GT Black Series (C190) - M178 LS2

What is a JB4?

The JB4 is a plug & play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. While it's not the only tuning system that operates this way, the JB4 separates itself from the competition with much more advanced connection points and processing, including CANbus, fuel & spark control, Bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. In addition, the JB4 system is not VIN-locked to your vehicle and can quickly be removed and swapped between cars or resold at a later time. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade and is sold in over 67 countries worldwide.

Is the JB4 a real tune?

Yes the JB4 is a real tune. By tapping into specific sensors and CANbus for real time vehicle data the JB4 is able to alter your boost, timing, AFR, and/or fuel trims, to a similar degree an ECU reflash would, but without the vehicle ever knowing its been tuned. The result is safe, smooth, and significant power and torque gains while retaining your factory safety systems and without having to unlock/flag your ECU.

View manufacturer installation guide

DYNO RESULTS

2018 AMG C63 with BMS Intake, 30% E85

2018 AMG C63, 30% E85

2018 C63, JB4, BMS Intake, BCM, Race Gas Mix

What is a JB4 for the Mercedes Benz C63 AMG Video

Mercedes Benz C63 AMG JB4 Reaction Video

Mercedes Benz C63 AMG JB4 Install Video

Mercedes C63 JB4 OBDII / APP Install

Mercedes Benz C63 AMG JB4 Mobile App Demo Video

Manufacturer shipping restriction

This product cannot be shipped to California.

Confirm before you order

Check the listed model years, engine and chassis, and any required supporting parts. Installation instructions and manufacturer restrictions supplied above apply to the selected product.

Returns

This item is supplied through Burger Motorsports and is non-returnable. Confirm your vehicle, engine, model year and selected options before ordering. Contact Speedzone Performance if you need help checking compatibility.