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200-cell-downpipes, 4.0t-v8, bahrain, bolt-on, c253, catless-downpipes, downpipes, ecu-tuning, exhaust-sound, exhaust-upgrade, gcc-tuning, glc63, glc63-s, high-flow-cats, hot-v, kuwait, m177, mercedes-amg, oman, performance-suv, power-gains, qatar, saudi-arabia, stage-2, suv, turbo-upgrade, twin-turbo, uae, x253, ypg-motorsport - September 21, 2026

Mercedes-AMG GLC63 & GLC63 S Downpipe Guide — Catless & 200-Cell | M177 4.0T V8 | Power Gains, Sound & Installation

The Mercedes-AMG GLC63 and GLC63 S are the most powerful compact SUVs in the Mercedes lineup — packing the same M177 4.0-liter twin-turbo V8 found in the C63 S into a practical, daily-drivable SUV platform. Whether you use yours for school runs or track days, upgrading the factory downpipes is the single most effective bolt-on modification to unlock the M177's true potential in the GLC chassis.This guide covers everything you need to know about upgrading the downpipes on your GLC63: catless versus 200-cell high-flow catted options, real-world power gains at each stage, exhaust sound changes, fitment across SUV and Coupé...

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