Fabspeed Mercedes-Benz AMG GT 4.0L V8 Bi-Turbo XperTune Performance Software Style:Default 2 Carrera Race Headers (includes

2 Carrera Race Headers (includes Cat Bypass)  Fabspeed 997

Rennline's fully adjustable gas pedal system is an industry first

875" dump tubes bypassing the mufflers

When added to Fabspeed's Valvetronic Exhaust

Fabspeed Mercedes-Benz AMG GT 4.0L V8 Bi-Turbo XperTune Performance Software Style:Default 2 Carrera Race Headers (includesPerformance 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