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Mercedes-AMG GT63 & GT63 S C192 Downpipe Guide — Catless | M177 4.0T V8 | Power Gains, Sound & Installation
The Mercedes-AMG GT63 and GT63 S 4-Door Coupé represent the pinnacle of AMG's four-door performance lineup. The C192 generation carries the M177 4.0-liter twin-turbo V8 in a chassis that combines genuine supercar performance with four-door practicality. Upgrading the factory downpipes is the single most effective bolt-on modification to push this platform well beyond its factory output.This guide covers catless downpipe options, real-world power gains, exhaust sound transformation, C192 fitment details, and why a Stage 2 ECU calibration is essential to extract the full benefit.The M177 in the GT63 — Platform OverviewThe C192 GT63 uses the same M177 4.0-liter twin-turbocharged V8...