Scorpion Mercedes A45S AMG W177 GPF-Back Exhaust System

Designed and manufactured by Scorpion’s experienced engineering team, this 89.9mm (3.5″) GPF-back exhaust system is tailored specifically for the Mercedes A45S AMG W177. By replacing the standard exhaust pipework from the particulate filter backwards, it optimises exhaust gas flow and enhances the exhaust note for a more involving driving experience, all while maintaining a clean, OE-style fit and finish.

Valved or Non-Valved?

Scorpion offers two valve configurations to match your driving preferences:

• Valved: Reuses the OEM valve motors, so the exhaust note still responds to the car’s drive mode select button. Switch between a quieter cruise and a more vocal spirited driving mode as standard.
• Non-Valved: Removes valve functionality for a constant, uninterrupted exhaust tone. This option requires a valve delete module to prevent fault codes on the ECU.
  

How Does It Improve Your A45S?

The acoustically tuned silencers feature Scorpion’s unique internals, paired with precision CNC mandrel bent pipework. Mandrel bending keeps the pipe’s internal diameter consistent through every bend, which helps gases leave the engine more efficiently. The result is improved exhaust flow, sharper throttle response, and a small reduction in kerb weight thanks to the full T304 lightweight stainless steel construction. Built to withstand year round UK conditions, all Scorpion systems are designed for long term durability and feature a lifetime warranty*.

While power gains on GPF equipped cars are typically modest compared to pre GPF models, owners can expect a clearer, more characterful exhaust note and a more responsive feel under acceleration. Of course when combining with other modifications and a remap gains can be much greater.

Technical Specification