This exhaust system is centered around a large 3.5-inch midpipe, designed to dramatically reduce backpressure compared to the factory layout. The increased cross-section allows exhaust gases to move more freely, improving turbo response on the E400 and sharpening overall engine behavior on the AMG-tuned E43. By maintaining high flow capacity through the mid-section, the system ensures consistent performance even under sustained load or spirited driving.
At the rear, the exhaust transitions into a valved dual-path muffler design. With the valves closed, exhaust gases are routed through a controlled internal path that keeps sound levels refined and cabin noise minimal—ideal for commuting, highway cruising, or long-distance driving. Open the valves using the included remote valve control system, and the exhaust shifts to a more direct flow route, delivering a louder, deeper, and more aggressive tone with crisp throttle response and pronounced overrun characteristics.
The system is engineered using precise underbody measurements to ensure perfect fitment, proper clearance, and OEM-style mounting. All sections are hand TIG-welded for strength and longevity, with smooth transitions and consistent wall thickness to preserve exhaust velocity. The result is a system that not only sounds better, but also feels sharper and more responsive throughout the rev range.
Performance Gains
Thanks to the high-flow midpipe and reduced exhaust restriction, the system delivers tangible performance benefits:
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Horsepower Gain:
+15–22 HP at higher RPM -
Torque Gain:
+18–25 lb-ft, especially noticeable in the mid-range -
Throttle Response:
Improved turbo spool and sharper acceleration response
These gains are achieved without ECU tuning, though additional power can be unlocked when paired with aftermarket software.
Key Specifications
Configuration
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Performance cat-back exhaust system
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3.5-inch high-flow midpipe
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Dual rear mufflers with active valve control
Valve Control
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Included remote valve control module
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On-demand switching between quiet and aggressive modes
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Independent of factory drive modes for maximum flexibility
Materials & Construction
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Available in AISI 304 Stainless Steel
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Hand TIG-welded construction
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Precision-formed piping with smooth internal transitions
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Heat-resistant design for long-term durability
Installation
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100% bolt-on design
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Utilizes factory mounting points
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No cutting or welding required
Vehicle Fitment
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Mercedes-Benz W213 E400 – 2014–2018
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Mercedes-AMG W213 E43 – 2016–2018
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Engine Platforms: Turbocharged V6 variants
