Mercedes-Benz CLS53 (2019-) C257 Valvetronic Exhaust System

Fi EXHAUST Valvetronic System – Mercedes-AMG C257 CLS53

T304 Stainless Steel | Precision Tuned | Motorsport-Inspired Sound

🔥 Elevate Your AMG Driving Experience

Crafted specifically for the Mercedes-AMG C257 CLS53, the Fi EXHAUST Valvetronic System delivers an immersive driving experience with a finely tuned exhaust note and increased performance. Built from T304 high-grade stainless steel, this bolt-on upgrade combines luxury and aggression in one seamless package.

🎵 Valvetronic Sound Control

This intelligent system features valvetronic technology, giving you real-time control of your exhaust tone and flow:

• Valves Closed – Quiet, composed tone perfect for everyday driving

• Valves Open – Ferocious and sporty acoustics for spirited performance

Control via:

• Factory exhaust/sport button or drive mode selector

• Optional Fi EXHAUST Remote Control or Mobile App

⚙️ Performance Benefits

With the complete catback and downpipe installed:

• Gain 5–10% more horsepower

• Noticeable throttle response improvement

• Enhanced torque delivery across RPM range

• Signature Fi exhaust tone with minimal drone

🧩 System Components – Sold Separately

✅ Catback Exhaust (Non-OPF)

• Front Pipe + Mid X-Pipe + Valvetronic Muffler

• Includes OBD2 / Mobile App Remote Control System Module

• Compatible with OEM electronic valve

• Part #: MB-257A6-CBE + R2020OBD + ACT-BN*2 + OBD-CAB-BNE

🔥 Downpipes (Optional – Non-OPF Vehicles Only)

Upgrade to race-inspired performance:

1. Ultra High Flow Catless Downpipe

   • Part #: MB-257A6F-NCAT

   • Includes: OPFCAP-002*1 + OPFCAP-003*2

   • Maximum flow and sound intensity

2. Sport 200 Cell Catted Downpipe

   • Part #: MB-257A6-CAT200

   • Emissions-friendly with high-performance gain

📱 Optional Add-On

Fi EXHAUST Pro Remote Control Module

• Adds advanced OBDII-based valve control via mobile app

• Already included in Catback Kit above

• Sold separately if needed standalone

🚘 Fitment Information

• Make: Mercedes-AMG

• Model: CLS53

• Chassis: C257

• Engine: 3.0L Inline-6 Turbo (M256)

• Years: 2019–Present

• Ensure vehicle is Non-OPF for downpipe compatibility

⚠️ Notes

• Each component must be ordered individually

• Exhaust visuals may differ by year and region

• System is subject to ongoing design enhancements

• Professional installation strongly recommended

💥 Redefine Performance & Presence

With the Fi EXHAUST System for the CLS53, you’re not just upgrading sound — you're upgrading your entire driving character. Bold, responsive, and refined — just like the AMG itself