GT63 Stage 3 vs Stage 4 Turbo Upgrade — M177 Power Levels Compared

When Stage 1 and Stage 2 Are Not Enough

The Mercedes-AMG GT63's stock M177 twin-turbo V8 is engineered for extraordinary performance. But the factory turbos have a ceiling — even with the best ECU calibration and supporting hardware, the stock units top out around 800–860HP at the crank. When you are ready for four-digit power numbers, the path leads to Stage 3 and Stage 4 turbocharger upgrades.

Stage 3 Turbo Upgrade for the GT63 M177

The YPG Stage 3 turbocharger upgrade for the Mercedes-AMG GT63 C192 is a drop-in replacement for the factory M177 twin-turbo units. Engineered for the M177's turbo housing architecture, Stage 3 turbos deliver significantly more airflow than the OEM units while maintaining full compatibility with the stock inlet manifold, intercoolers, and intake routing.

Stage 3 Power Targets (GT63 M177)

• Crank power: 950–1,050HP on 98 RON with Stage 3 ECU calibration
• Wheel power: 850–950HP depending on transmission and AWD losses
• Suitable for street and drag strip use
• Spool characteristics: slightly later than stock but with a linear powerband

Stage 4 Turbo Upgrade for the GT63 M177

The YPG Stage 4 turbo system takes the GT63 M177 to its extreme mechanical limits. These are full-billet precision-engineered turbocharger units — significantly larger than Stage 3 — matched to our highest-level ECU calibration for the C192 platform. Stage 4 is for builds targeting 1,200HP and beyond.

Stage 4 Power Targets (GT63 M177)

• Crank power: 1,200–1,400HP+ on E85 or race fuel
• Wheel power: 1,050–1,250HP
• Requires full supporting hardware: forged internals, ported heads, upgraded fuelling
• Designed for high-speed drag racing and track applications

Stage 3 vs Stage 4 — Comparison Table

What Supporting Hardware Is Required?

Both Stage 3 and Stage 4 turbo upgrades require a full supporting hardware package to operate safely and reliably:

• M177 Forged Rods and Pistons — required for Stage 4, strongly recommended for Stage 3
• M177 Ported Cylinder Heads — maximises airflow efficiency with larger turbos
• Upgraded Fuel System — injectors, fuel pump, and lines rated for target power
• Intercooler Upgrade — essential for managing intake temperatures at higher boost levels
• CPC Unlock + ECU Calibration — both stages require a matched ECU tune alongside the turbo upgrade

Which Stage Is Right for Your GT63?

Choose Stage 3 if you want near-four-digit power on pump fuel, you still want the car streetable in GCC conditions, and you are not planning an all-out race build.

Choose Stage 4 if you are building for drag racing, quarter-mile records, or maximum power output. Stage 4 is for serious race builds with full internal engine work using the M177 1,500HP+ crate engine platform or equivalent.

Frequently Asked Questions

Do Stage 3 turbos require upgraded fuel on the GT63?

Stage 3 runs on 98 RON with appropriate calibration. For maximum power output, E40 or higher ethanol content delivers better results. Stage 4 requires E85 or dedicated race fuel.

Are Stage 3 turbos a direct bolt-on for the C192 GT63?

Yes. Stage 3 is a direct drop-in replacement with the same mounting points and inlet/outlet configuration as the factory M177 turbos. Stage 4 may require minor modifications to inlet manifold or intercooler piping depending on configuration.

How long does Stage 3 turbo installation take on the GT63?

Typically 2–3 days at YPG Motorsport's Hawalli facility, including ECU calibration. Stage 4 full builds can take 1–2 weeks depending on supporting hardware scope.

Can YPG ship Stage 3 and Stage 4 turbos internationally?

Yes. We ship worldwide. Contact us for shipping rates and lead times to your region.

Order the GT63 Stage 3 Turbo Upgrade or the GT63 Stage 4 Turbo Upgrade from YPG Motorsport.