Unlock Maximum Performance with Mercedes C63 W205 Catted and Catless Downpipes & A45S Decat Downpipe

When it comes to tuning your Mercedes-AMG for peak performance, few upgrades deliver as much raw horsepower and aggressive sound as downpipes. Whether you’re chasing dyno numbers, optimizing airflow, or just want that head-turning exhaust note, upgrading to mercedes c63 w205 catted and catless downpipes or installing a Mercedes A45S decat downpipe is a game-changer.

Let’s explore how these high-performance parts can transform your AMG driving experience.

What Are Downpipes & Why They Matter?

A downpipe is a key component of the exhaust system that connects the turbocharger to the rest of the exhaust. In stock form, many downpipes contain restrictive catalytic converters that limit exhaust flow to meet emissions regulations. While this is fine for everyday drivers, performance enthusiasts often upgrade their downpipes for better exhaust flow, increased power, and a deeper, more aggressive sound.

Catted vs. Catless Downpipes – What’s the Difference?

• Catted Downpipes: These come equipped with high-flow catalytic converters. They maintain some level of emissions compliance while significantly reducing backpressure compared to stock pipes. This is a great option for those who want a balance between performance and legality, especially in regions with strict emissions testing.
• Catless Downpipes: As the name suggests, these have no catalytic converters. They offer maximum performance gains, the loudest possible exhaust tone, and the fastest turbo spool. However, they are not emissions-compliant and can trigger a check engine light without tuning.

Mercedes C63 W205: Catted and Catless Downpipes

The Mercedes-AMG C63 W205 is a beast with its twin-turbo V8. But with factory downpipes, it’s like keeping a lion in a cage. Replacing them with catted or catless downpipes allows this engine to breathe and roar like it was meant to.

Benefits of Upgrading:

• Gains of 30–60 horsepower (with tuning)
• Faster turbo response
• Enhanced throttle feel
• Deeper, throatier exhaust note
• Reduced turbo lag

For those who daily drive their C63, a Mercedes C63 W205 catted and catless downpipes setup provides flexibility. You can choose catted for a slightly quieter ride and lower emissions—or go catless for track days when you want full-blown performance.

Mercedes A45S Decat Downpipe – Small Car, Big Gains

The Mercedes-AMG A45S might be compact, but its M139 2.0L turbocharged engine is one of the most powerful four-cylinders on the market. A decat downpipe is the perfect upgrade to unlock the car’s full potential.

Why Go Decat?

• Eliminates restrictions for max airflow
• Boosts horsepower and torque significantly
• Offers a raw, motorsport-like sound
• Ideal for those planning ECU remaps or custom tunes

A mercedes a45s decat downpipe is a favorite among enthusiasts looking for that crackle, pop, and high-performance tone that stock setups just can’t provide.

Tune Required?

Yes. Whether you go catted or catless, tuning is highly recommended (and often necessary) to optimize performance, prevent check engine lights, and ensure your turbo system adapts to the reduced backpressure. A custom tune can also adjust air-fuel ratios, boost levels, and exhaust gas temperatures for safe, long-term performance.

Legal and Warranty Considerations

Before upgrading, always check your local laws regarding emissions and vehicle modifications. Catless and decat systems are generally not street-legal in many regions. Additionally, these mods may affect your manufacturer’s warranty.

Final Thoughts

Upgrading to performance downpipes is one of the most rewarding changes you can make to a Mercedes-AMG. Whether you’re unleashing the full fury of a C63 W205 or extracting hidden power from an A45S, downpipes are the gateway to serious gains. With the right setup and a proper tune, your AMG will sound better, drive harder, and feel more alive than ever before.