Mercedes GLC 63 S Downpipes – Catted & Decat AMG Performance Exhaust Upgrades

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Upgrade your Mercedes-AMG GLC 63 S with premium performance downpipes. Choose between catted and decat options to boost power, improve turbo spool and unleash an aggressive AMG exhaust tone.

Mercedes GLC 63 S Downpipes – Unlock the Full Potential of the 4.0 V8 BiTurbo

The Mercedes-AMG GLC 63 S is a high-performance SUV powered by the iconic 4.0 V8 BiTurbo M177 engine, delivering up to 510 HP in stock form. While the OEM setup provides incredible power, the restrictive factory downpipes limit exhaust flow and tuning potential. Upgrading to a performance Mercedes GLC 63 S downpipe unlocks hidden horsepower, enhances turbo efficiency, and delivers a deeper, more aggressive AMG exhaust note.

Why Upgrade to a Performance Mercedes GLC 63 S Downpipe?

Factory-installed downpipes are designed for emissions compliance and noise reduction, which restricts exhaust flow and overall performance. A performance downpipe provides immediate benefits:

  • +40–90 HP gains on stock turbos.
  • +100–150 HP when paired with Stage 2 ECU tuning.
  • Faster turbo spool – reduced backpressure means sharper throttle response.
  • Lower exhaust gas temperatures – improved cooling under heavy loads.
  • Enhanced AMG exhaust tone – catted for a refined sporty sound, decat for a raw motorsport roar.

Types of Mercedes GLC 63 S Downpipes

We offer multiple configurations of Mercedes GLC 63 S downpipes designed to suit different builds and driving styles:

Catted Mercedes GLC 63 S Downpipes

Catted downpipes integrate high-flow sports catalytic converters, maintaining emissions compliance while increasing performance. Perfect for daily-driven AMG builds in regions with emissions testing.

Decat Mercedes GLC 63 S Downpipes

Decat downpipes remove catalytic converters entirely, allowing unrestricted airflow for maximum performance. Ideal for track-focused builds, dyno runs, and aggressive tuning setups.

Material Options: Stainless Steel & Titanium

The material choice for your Mercedes GLC 63 S downpipe affects weight, durability, and heat management:

  • Stainless steel downpipes – corrosion-resistant, strong, and cost-effective.
  • Titanium downpipes – ultra-lightweight, premium motorsport-grade finish, and superior thermal performance.

Mercedes GLC 63 S Models & Engine Compatibility

Our Mercedes GLC 63 S downpipes are designed for both pre-facelift and facelift AMG models:

  • Mercedes GLC 63 S AMG SUV Downpipes – optimized for M177 twin-turbo V8 engines.
  • Mercedes GLC 63 S AMG Coupe Downpipes – engineered for aggressive exhaust flow and seamless fitment.
  • X253 & X254 Downpipes – compatibility with both previous and current generations.

Performance Gains with Mercedes GLC 63 S Downpipes

Replacing the restrictive OEM downpipes with performance GLC 63 S downpipes provides measurable results:

  • +40–90 HP with a downpipe-only upgrade.
  • +100–150 HP when combined with Stage 2 ECU remapping.
  • Sharper throttle response and increased torque delivery.
  • Enhanced top-end power and aggressive AMG exhaust sound.

Stage 1, Stage 2 & Hybrid Turbo Builds

The Mercedes GLC 63 S AMG platform delivers extreme tuning potential when combined with upgraded downpipes:

  • Stage 1 – catted downpipe + ECU remap for balanced gains suitable for everyday driving.
  • Stage 2 – decat downpipe + performance intercooler + custom ECU mapping for maximum AMG power.
  • Hybrid turbos – 3.5-inch downpipes optimized for ultra-high-boost setups exceeding 800 HP.

Choosing the Right Diameter

Pipe diameter plays a key role in maximizing exhaust flow and performance:

  • 3.0-inch downpipes – ideal for Stage 1 and Stage 2 builds.
  • 3.5-inch downpipes – designed for hybrid turbos and extreme AMG tuning projects.

All Mercedes GLC 63 S downpipes are built for direct bolt-on installation with OEM-style fittings and gaskets.

Build Quality & Engineering

Our performance GLC 63 S downpipes are manufactured using motorsport-grade engineering:

  • Mandrel-bent tubing for smooth, unrestricted exhaust flow.
  • Precision TIG welding ensures structural integrity and leak-free operation.
  • OEM-style flanges and fittings guarantee perfect fitment.
  • Optional ceramic coatings improve thermal efficiency and reduce engine bay heat.

Tuning Potential

Pairing your Mercedes GLC 63 S downpipe with ECU tuning unlocks the full potential of the M177 twin-turbo engine:

  • Massive horsepower and torque increases.
  • Optimized boost response and fueling strategies.
  • Customizable AMG exhaust tone depending on catted or decat configuration.
  • Essential for Stage 2 and Stage 3 AMG builds.

Catted vs Decat – Which Should You Choose?

The decision between catted and decat downpipes depends on your build goals:

  • Catted downpipes – ideal for street-driven AMG builds requiring emissions compliance and refined sound.
  • Decat downpipes – perfect for track cars, dyno tuning, and maximum-flow applications.

Conclusion

Upgrading to a performance Mercedes GLC 63 S downpipe is one of the most effective ways to unleash the full potential of your AMG. Whether you choose a catted downpipe for road-friendly performance or a decat downpipe for maximum gains, our selection guarantees premium quality, seamless fitment, and proven results. Take your GLC 63 S to the next level today.

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