Mercedes-AMG G63 Tuning Guide for GCC Owners — Stage 1, 2 & 3 Power, Cost & Best Mods (2026)
Mercedes-AMG G63 Tuning for GCC Owners
Kuwait · UAE · Saudi Arabia · Qatar — by YPG Motorsport
The AMG G63 is the most culturally significant performance vehicle in the GCC market — part status symbol, part off-road capable truck, part 577HP twin-turbo V8 sports car. The M177 engine underpinning the G63 is the same unit found in the AMG GT and C63, and it responds to ECU tuning exactly as well. A Stage 2 G63 with catless downpipes and a proper ECU calibration pushes well past 680HP crank.
Power Gains — AMG G63
| Stage | Power | Torque | Requirements |
|---|---|---|---|
| Stock | 577 HP | 850 Nm | — |
| Stage 1 | 640 HP | 940 Nm | ECU only |
| Stage 2 | 700 HP | 1050 Nm | Catless downpipes + ECU |
Crank figures on 95–98 RON GCC pump fuel.
Exhaust Upgrades for the G63
The G63's stock exhaust is deliberately quiet. Performance exhaust upgrades transform both the sound and power output.
- Catless downpipes — largest single power gain. Required for Stage 2.
- Cat-back exhaust — improves exhaust note and marginal flow gains.
- Valve exhaust — remote-controlled switchable quiet/loud mode.
Process for GCC Owners
- Contact YPG — confirm your G63 year and current modifications
- ECU pull — workshop removes ECU for bench flash
- Ship to Kuwait — FedEx International Priority, 1 day from UAE/Saudi
- Flash — 2–4 business day turnaround
- Return — FedEx back, workshop reinstalls. Door-to-door: 5–7 days