Performance Catted Downpipes for Mercedes Benz E-Class E63 E63S W213 (2017-2021) 4.0L

High-Flow Performance Catted Downpipes for 2017-2021 Mercedes Benz E-Class (W213)

What it Does: The Performance Catted Downpipes replace the dense, restrictive factory catalytic converters on the 2017-2021 Mercedes Benz E-Class to reduce exhaust backpressure, lower exhaust gas temperatures (EGTs), and accelerate turbo spool.

The Stock Mercedes Benz E-Class Exhaust Flow Restriction

From the factory, the W213 AMG platform utilizes tightly packed, high-cell-density ceramic catalytic converters mounted directly downstream of the "hot-V" twin turbos. This OEM configuration creates significant thermal buildup and excessive exhaust backpressure against the turbine wheels. The resulting restriction impedes scavenging efficiency, raises operating temperatures under sustained load, and delays transient boost response, limiting the true potential of the twin-turbocharged V8 platform.

The Engineering Solution

Engineered for maximum flow velocity and thermal management, these high-flow catted downpipes are constructed from premium, mandrel-bent stainless steel to eliminate internal turbulence and resist extreme heat cycling. High-flow catalytic converter cores dramatically decrease backpressure while preserving catalytic operation, bridging the gap between factory restriction and catless configurations. Precision TIG-welded joints and CNC-machined flanges guarantee structural integrity and exact alignment with OEM turbo housings, substantially reducing turbo lag, dropping underhood temperatures, and enhancing exhaust acoustic clarity.

What's Included

• 1 x pair stainless high-flow catted turbo downpipes

Technical Specifications

Compatibility

• 2017-2021 Mercedes Benz E-Class E63 (W213) 4.0L M177
• 2017-2021 Mercedes Benz E-Class E63S (W213) 4.0L M177

Frequently Asked Questions & Fitment Warnings

Does this fit the W213 E-Class?

Yes, this is a direct fit for the 2017-2021 Mercedes Benz E-Class equipped with the M177 4.0L biturbo engine; it does not fit non-M177 or non-W213 chassis vehicles.

Is an ECU recalibration required after installing these downpipes?

While designed as a direct bolt-on replacement, an ECU tune is strongly recommended to optimize air-fuel ratios and prevent post-cat oxygen sensor efficiency codes.

The Mercedes Benz Precision Standard

Engineered to meet the stringent demands of modern European performance motoring, these downpipes deliver precision fitment and elevated gas scavenging without sacrificing structural durability under aggressive thermal cycles.