BMS JB4 Performance Tuner for Mercedes-AMG C63/C63S, E63/E63S, GLC 63/63S & AMG GT/GT S/GT 63 (M177/M178 4.0 V8 Biturbo) Plug & Play Tuning Box

Burger Motorsports JB4 Power Module for AMG 4.0‑litre Twin‑Turbo V8

Transform the way your AMG delivers power with the Burger Motorsports JB4 piggyback module. Designed for the M177 and M178 4.0‑litre V8 twin‑turbo engine family, this quick‑fit performance upgrade unleashes huge gains while retaining factory smoothness and drivability. Compatible with C-Class C63 and C63 S, E-Class E63 and E63 S, GLC 63 and 63 S, AMG GT and GT S, plus AMG GT 63 four‑door models, the JB4 is the proven, reversible alternative to an ECU remap.

Big performance. OE refinement. No permanent flashing.

• Up to 100 bhp and 100 lb ft at the wheels on a stock vehicle
• Fast, clean installation with OEM‑style connectors and no wire cutting
• Deep CAN integration for intelligent safety and control
• Multiple map presets for 95/98 RON, ethanol blends, high octane and WMI, plus a reduced‑output Valet mode
• Boost‑by‑gear to help traction and reduce wheelspin
• Data logging, on‑the‑fly map changes, firmware updates and diagnostic code read/clear
• Not VIN locked, so you can transfer or resell
• Made in the USA with a 5‑year warranty

What our customers say

We run this kit on customer cars and the feedback is consistent: instant torque, relentless mid‑range and a stronger top end with stock‑like manners. The JB4 delivers Stage 1 style gains with the flexibility to tailor power for road, track days or drag use. It is the go‑to AMG tuning solution for drivers who want serious performance without opening the ECU.

How the JB4 delivers

The module intercepts the factory TMAP, charge pipe MAP and fuel pressure sensors on both banks along with the OBDII CAN connection. This allows precise control of boost and fuel targets while monitoring knock, fuel trims, IAT and other key parameters for robust safety. Use the optional JB4 Mobile app or BMS Data Cable to change maps, log runs, update firmware and check or clear fault codes.

BCM Boost Control Module upgrade

Planning heavy bolt‑ons, WMI, larger turbos or high‑octane fuel and aiming for higher boost targets? The optional BCM harness enables direct wastegate control to provide additional duty cycle where needed. It plugs into the JB4 loom and the boost control solenoid under the car.

Connectivity options

• JB4 Wireless Mobile Connect Kit for iOS and Android
• BMS Data Cable for Windows laptops

Both options support smartphone or laptop logging, easy map changes and free firmware updates as new features are released.

Vehicle compatibility

• C‑Class: 2015‑on C63 and C63 S AMG (W205/S205/C205)
• E‑Class: 2017‑on E63 and E63 S AMG (W213/S213)
• GLC: 2015‑on GLC 63 and GLC 63 S (X253/C253)
• AMG GT two‑door: 2016‑on AMG GT and GT S (C190)
• AMG GT four‑door: 2018‑on GT 63 and GT 63 S (X290)

Engine platforms: M177 and M178 4.0‑litre bi‑turbo V8.

Professional fitting and support

The JB4 installs discreetly and is fully reversible. For expert installation, dyno setup and advice, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Further resources

For detailed maps, firmware notes and community logs, visit the official support thread: n54tech.com JB4 AMG thread

Part number

BMS044

Manufacturer

Burger Motorsports

Warranty

5‑year warranty

Search terms to help you find the right upgrade

AMG tuning module UK, AMG performance chip M177, M178 piggyback, C63 power upgrade, E63 power module, GLC63 tuning box UK, AMG GT tuning solution, GT 63 power box, twin‑turbo V8 upgrade, Burger Tuning module, AMG remap alternative, Stage 1 AMG upgrade, 4.0 V8 bi‑turbo performance, quick fit tuner, boost controller for AMG, JB4 Bluetooth kit, JB4 app, AMG ethanol tune, AMG WMI kit, dyno proven AMG gains, UK AMG tuner, Warwickshire performance specialist.

Ready to feel the difference? Order today and let MJ Modifications help you get the most from your AMG.