Fabspeed Mercedes-Benz AMG GT 4.0L V8 Bi-Turbo XperTune Performance Software Accessories & Apparel the valves open up

the valves open up

Includes Fabspeed ECU Tune to optimize engine performance for the additional horsepower and torque and to alleviate potential check engine faults when running the Race configuration

save weight and add a throatier more aggressive tone

Porsche Panamera 3

Thus they may come with less heatshielding than pictured

Fabspeed Mercedes-Benz AMG GT 4.0L V8 Bi-Turbo XperTune Performance Software Accessories & Apparel the valves open upPerformance 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. Special requests