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

Mercedes GLC 63 Downpipes – Unlock Extreme AMG Performance

The Mercedes-AMG GLC 63 and GLC 63 S deliver supercar-level performance thanks to the legendary 4.0 V8 BiTurbo M177 engine. However, the restrictive OEM downpipes limit the full potential of this powerhouse. Upgrading to a performance Mercedes GLC 63 downpipe is one of the most effective modifications to increase horsepower, improve turbo response, and achieve a deeper, motorsport-inspired AMG exhaust tone.

Why Upgrade to a Performance Mercedes GLC 63 Downpipe?

Stock downpipes include restrictive catalytic converters designed to comply with emissions and noise regulations, but they compromise power and turbo efficiency. Installing a performance downpipe offers significant benefits:

• +35–80 HP gains on stock turbos.
• +90–140 HP when paired with Stage 2 ECU remapping.
• Faster turbo spool – reduced backpressure means quicker boost and sharper throttle response.
• Lower exhaust gas temperatures – improved reliability under high-performance conditions.
• Enhanced exhaust tone – catted for a refined AMG note, decat for an aggressive motorsport roar.

Types of Mercedes GLC 63 Downpipes

Our Mercedes GLC 63 downpipes are designed for various driving styles, performance goals, and tuning stages:

Catted Mercedes GLC 63 Downpipes

Catted downpipes use a high-flow sports catalytic converter, balancing performance gains and emissions compliance. Perfect for daily-driven AMG builds and areas with strict emissions testing.

Decat Mercedes GLC 63 Downpipes

Decat downpipes completely remove the catalytic converter, maximizing exhaust flow and unlocking peak performance. Ideal for track cars, dyno tuning, and unrestricted AMG builds.

Material Options: Stainless Steel & Titanium

The material quality of your Mercedes GLC 63 downpipe affects durability, weight, and thermal management:

• Stainless steel downpipes – cost-effective, corrosion-resistant, and highly durable.
• Titanium downpipes – ultra-lightweight, premium motorsport-grade finish, and superior heat dissipation.

Mercedes GLC 63 Models & Engine Compatibility

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

• Mercedes GLC 63 AMG Downpipes – optimized for the 4.0 V8 BiTurbo M177 engine.
• Mercedes GLC 63 S AMG Downpipes – designed for high-output AMG builds requiring maximum flow.
• Mercedes GLC 63 Coupe Downpipes – tailored for both SUV and Coupe variants.

Performance Gains with Mercedes GLC 63 Downpipes

Replacing the OEM downpipes with a performance Mercedes GLC 63 downpipe brings measurable results:

• +35–80 HP with downpipes alone.
• +90–140 HP when combined with Stage 2 ECU mapping.
• Improved mid-range torque and top-end power.
• Sharper throttle response and reduced turbo lag.

Stage 1, Stage 2 & Hybrid Turbo Builds

The Mercedes GLC 63 AMG responds exceptionally well to exhaust upgrades when paired with tuning:

• Stage 1 – catted downpipe + ECU remap for smooth, road-friendly performance gains.
• Stage 2 – decat downpipe + upgraded intercooler + custom ECU mapping for maximum AMG power.
• Hybrid turbo builds – 3.5-inch downpipes optimized for extreme power levels and high-boost applications.

Choosing the Right Diameter

Pipe diameter has a significant impact on power delivery:

• 3.0-inch downpipes – ideal for Stage 1 and Stage 2 builds.
• 3.5-inch downpipes – recommended for hybrid turbos and ultra-high-performance AMG setups.

All Mercedes GLC 63 downpipes are designed for direct bolt-on installation with OEM-style fittings for perfect integration.

Build Quality & Engineering

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

• Mandrel-bent tubing ensures smooth, unrestricted exhaust flow.
• Precision TIG welding guarantees maximum strength and durability.
• OEM-style gaskets and fittings for leak-free installation.
• Optional ceramic and heat-reflective coatings improve thermal performance.

Tuning Potential

Pairing your Mercedes GLC 63 downpipe with ECU tuning unlocks the full capabilities of the 4.0 V8 BiTurbo engine:

• Substantial horsepower and torque increases.
• Optimized boost control and fueling strategies.
• Customizable AMG exhaust note depending on catted or decat setup.
• Essential for Stage 2 and Stage 3 AMG builds.

Catted vs Decat – Which Should You Choose?

The choice between catted and decat downpipes depends on your goals:

• Catted downpipes – ideal for road-driven AMG builds requiring emissions compliance and balanced sound.
• Decat downpipes – perfect for track-focused, high-performance setups demanding maximum flow.

Conclusion

Upgrading to a performance Mercedes GLC 63 downpipe is one of the most effective ways to increase power, improve turbo spool, and enhance your AMG exhaust sound. Whether you choose a catted downpipe for daily driving or a decat downpipe for ultimate performance, our selection guarantees premium quality, perfect fitment, and proven results. Transform your GLC 63 today and unleash its full AMG potential.