Mercedes-AMG GT tune. Nashville.
The M178 is the dry-sump, hand-built variant of the M177 — used in the AMG GT, GT S, GT C, and GT R. Halo platform pricing applies. Every AMG GT we tune is custom-mapped on our dyno with the customer present. Pricing is by quote.
Halo platform — scoped per car.
The Mercedes-AMG GT isn't an off-the-shelf flash. Every one is quoted and mapped on our dyno around your goals and your fuel.
What we do for the gt.
The M178 platform is unique enough to warrant custom-mapped attention every time. We don't sell OTS tunes for the AMG GT — every build is scoped per customer, mapped on our dyno, and validated with the customer's specific fuel + supporting mod combination.
The M178 is the M177's dry-sump, hand-built sibling, mounted front-mid and paired with a 7-speed DCT transaxle at the rear axle — a genuinely different car to calibrate than the sedans. Turbo hardware varies across GT, GT S, GT C, and GT R, so the map is built per variant, never copied. The DCT gets clamp-pressure and shift-strategy work as part of every build; on a transaxle car the gearbox is half the experience.
- Custom-mapped on our chassis dyno with customer present
- Stock file archived (free stock-revert anytime)
- Multi-session tune — initial dyno + follow-up after break-in
- Flex-fuel and methanol injection scoped per customer
- Bench-flash for built engines
- Lifetime support on revisions
Pricing for the mercedes-amg gt.
Mods we pair with this tune.
AMG GT projects usually pair calibration with breathing and consistency mods:
- Downpipes + exhaust — the biggest unlock on the M178, and the soundtrack the chassis deserves.
- DCT calibration — transaxle clamp + shift speed matched to the new torque.
- Charge-cooling upgrades — keeps the hot-vee consistent on track days.
- E85 blends / race-gas maps — scoped per build for customers chasing the ceiling.
- Rubber + alignment — a tuned GT will out-accelerate its factory alignment; we spec it honestly.
Common questions.
Is there an off-the-shelf flash for the AMG GT?
Vendors offer OTS files — we don't sell or install them. Every halo platform we tune is custom on our dyno. Too much variance car-to-car for OTS.
What kind of power are AMG GT customers seeing?
Custom builds in the 700–800+ wheel hp range are documented. GT R Pro + Stage 2 + flex fuel territory is where the platform shows its real ceiling.
Does the M178 require race fuel?
Race fuel is optional. We've mapped customers running pump gas + flex E85 in the 750+ wheel hp range.
How long does the AMG GT appointment take?
Full day minimum. Built-motor / forced-induction-upgrade projects are multi-day, scoped ahead.
Does the DCT transaxle need its own calibration?
Yes — and it is included. Clamp pressure and shift strategy are matched to the engine map. A transaxle DCT slipping under new torque wears fast; we do not ship engine-only maps on this platform.
Do the GT, GT S, GT C, and GT R really tune differently?
The turbos, cooling, and factory calibrations differ across variants, so the ceiling and the map both shift. Same process, different numbers — which is why this platform is quoted per car.
Will a custom map hurt daily drivability?
No — drivability is half the tuning discipline. Cold starts, part-throttle, cruise behavior all stay factory-clean; the difference lives at the top of the pedal.
Scope your Mercedes-AMG GT build.
Every Mercedes-AMG GT is quoted per car. Call and we'll scope the whole build before you commit. 1035 3rd Ave S, Nashville, TN 37210 · Mon–Fri 8 to 5.