Mercedes-Benz AMG GT 4.0L V8 Bi-Turbo ExperTune Performance Software

Performance ECU software upgrade improves horsepower, torque, and driving characteristics of the AMG GT's 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.)
FEATURES:
Fits all Mercedes-Benz AMG GT's M178 4.0L Bi-Turbo Vehicles
AMG GT / GT S / GT C will see about 585 HP and 590 ft/lbs of TQ at the crank
AMG GT R will see about 625 HP and 630 ft/lbs TQ at the crank
Fabspeed Motorsport saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time