BMS JB4 Performance Tuner for Mercedes-AMG C63, E63, GLC 63, AMG GTS and AMG GT 63
Unlock serious power and torque from your Mercedes-AMG with the Burger Motorsports JB4 tuning box. This plug and play JB4 for the 4.0 V8 Biturbo M177 and M178 engines fits the C63 and C63S, E63 and E63S, GLC 63, AMG GTS and AMG GT 63 and GT 63S. Expect factory-smooth drivability with massive gains, on-the-fly map switching, CANbus integration and full data logging. If you are searching for Mercedes C63 tune, E63 tune, AMG JB4, Mercedes tuning box UK, C63 JB4, E63 JB4, AMG GTS tune or M177 M178 performance upgrade, the BMS JB4 is the proven choice trusted worldwide.
Why choose the JB4 for your AMG
- Power gains of up to 100 hp and 100 lb ft at the wheels on a stock vehicle
- True plug and play installation that can be fitted or removed in under an hour
- Advanced CANbus integration for unmatched safety, control and performance
- Multiple performance maps for pump fuel, E85 ethanol blends, race fuel and WMI, plus a reduced-power Valet map
- Runs as smoothly as stock and works with all OEM driving modes
- Fuel economy unchanged during normal driving
- Data logging, map changes, firmware updates and fault code read and delete
- User-adjustable boost by gear to help traction off the line
- Not VIN locked and can be moved to your next vehicle or resold
- Made in the USA with a 5 year warranty
Real-world results and customer feedback
We have run and fitted JB4 systems extensively and our customers love the instant torque, smooth power delivery and the flexibility to switch maps for road, track or drag use. The JB4 is the go-to Mercedes AMG tuning box for drivers who want big gains without permanent ECU flashing.
How it works
The JB4 interfaces with the factory TMAP, chargepipe MAP and fuel pressure sensors on each bank for six total connections, plus the OBDII port for CANbus. This gives intelligent control of boost, fuel and safety systems to deliver strong, reliable performance. You can switch maps on the fly, log runs, update firmware and check or clear fault codes via the optional JB4 Mobile app or BMS Data Cable.
Optional BCM Boost Control Module
For vehicles targeting very high boost with heavy bolt-ons, WMI, larger turbos and high-octane fuel, the optional BCM harness enables direct wastegate control for additional duty cycle when required. The BCM plugs into the JB4 harness and the boost control solenoid under the car.
Optional connectivity
- JB4 Wireless Mobile Connect Kit for iOS and Android
- BMS Data Cable for Windows laptops
Both options allow smartphone or laptop logging, map changes and free firmware updates as new features and maps are released.
Compatibility
- C-Class: 2015+ C63 and C63S AMG
- E-Class: 2017+ E63 and E63S AMG
- GLC: 2015+ GLC 63 and GLC 63S
- AMG GT S: 2016+ AMG GTS
- AMG GT 4-Door: 2018+ AMG GT 63 and GT 63S
Engine platforms: M177 and M178 4.0-litre twin-turbo V8 Biturbo.
Fitting and support
The discreet plug and play install is fully reversible and leaves no trace when removed. Professional fitting is available at Nforcd in Warwickshire. Request a quote by emailing Sales@nforcd.com.
Further resources
For detailed maps, firmware notes and community logs, visit the official support thread: n54tech.com JB4 AMG thread
Key search terms
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Part number
BMS044
Manufactured by
Burger Motorsports / Burger Tuning (BMS)
Warranty
5 year warranty.