Performance ECU software upgrade improves horsepower, torque, and driving characteristics of the M178 4.0L V8 Bi-Turbo Engine by reprogramming various sensor inputs, air/fuel ratios, and boost pressure.
NOTE: This is not a physical/shipped product. This upgrade requires you to send us your ECU for re-programming. You will be emailed a download link with detailed instructions after adding this to your cart and checking out.
SHIPPING DETAILS: Shipping costs for sending an ECU to Fabspeed is the responsibility of the purchaser. The ECU will be tuned within 24-48 hours of receiving it and Fabspeed will then ship back the ECU using whatever method it was shipped in with. (For example: If you send in your ECU via Ground shipping, we will ship it back via Ground. If you ship it via Overnight, we will ship it back via Overnight.)
Fits all Mercedes-Benz AMG 63 M178 4.0L Bi-Turbo Vehicles: C-Class / E-Class / S-Class / GLC-Class / GT / G-Class
Stock - 603 HP / 627 TQ
Tuned - 683 HP / 727 TQ
Fabspeed Motorsport saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time