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XperTune Performance Software
XperTune ECU performance software for the Mercedes-AMG GT's M178 4.0L V8 bi-turbo engine. Like Fabspeed's other mail-in AMG tunes, this requires sending in your ECU for reprogramming; turnaround is 24-48 hours once it arrives, and Fabspeed returns it via the same shipping method you used, at your cost. On the dyno, GT, GT S and GT C models see about 585 hp and 800 Nm at the crank, while the GT R reaches around 625 hp and 854 Nm. Your stock ECU settings are saved so you can revert to factory at any time.
Frequently asked
Which cars does the XperTune Performance Software fit?
Fits your Mercedes-AMG GT (C190, 2015+). Fabspeed lists this piece for: all Mercedes-Benz AMG GT's M178 4.0L Bi-Turbo Vehicles; Mercedes-Benz AMG GT. Exact fitment for your year, trim and options is confirmed on your free consult before anything is ordered.
What does the price include?
The delivered price includes the part from Fabspeed USA, freight to Australia, import costs and GST. Enter your postcode to refine delivery; the final figure is confirmed on consult.
How long until it arrives?
Every Fabspeed part is made in-house at Fabspeed USA with about a one-week production lead time, then allow another 3-4 days for delivery to Australia via UPS. That freight is already included in the price.
Do I need to send anything in for this tune?
Yes, this tune requires physically shipping your ECU to Fabspeed for reprogramming.
How long does the turnaround take?
About 24-48 hours once Fabspeed receives your ECU.
How much power does the tune add?
GT, GT S and GT C models reach about 585 hp and 800 Nm at the crank; the GT R reaches about 625 hp and 854 Nm.
Who installs it?
Rennen Motorsport in Adelaide, or an authorised dealer near you. Fitting it yourself may also be an option depending on the part, so raise it on your consult; professional installation is quoted separately.
Is it covered by warranty?
Fabspeed products carry the manufacturer's warranty, supported locally through Rennen Plus as the Australian principal. See our returns policy.
Can I just buy this outright, or do I need to talk to someone first?
Every enquiry, whether it's one part or a full build, starts with a free consult. We confirm the exact spec for your car before anything is quoted or ordered.
