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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...

The M276 3.0-liter BiTurbo V6 is the engine behind some of Mercedes-AMG's most popular performance sedans, coupes, and SUVs — including the C43, E43, GLC43, and C450 AMG. While overshadowed by its V8 siblings, the M276 responds exceptionally well to bolt-on modifications. Downpipes are the single most effective hardware upgrade you can make to this platform.This guide covers everything you need to know about upgrading the downpipes on your M276-powered Mercedes: catless versus high-flow catted options, real-world power gains at each stage, exhaust sound changes, fitment across all M276 models, and why an ECU calibration is essential to unlock the...

The Mercedes-AMG GLC63 S shares the same hand-built M177 4.0-litre twin-turbo V8 found in the C63 S and E63 S — but it sits inside a heavier, taller SUV chassis with full-time 4MATIC all-wheel drive. A Stage 3 turbo upgrade on the GLC63 pushes the M177 to 800 HP on pump fuel, transforming the family SUV into one of the fastest all-wheel-drive trucks on the road. The build path is nearly identical to the C63 Stage 3, but the GLC63's weight, thermal characteristics, and drivetrain layout demand specific attention to intercooling and heat management that sedan owners can afford to...