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    M278 Downpipes and Exhaust, E550 AWD


      • This product is not available within the USA

    Availability: In stock


    M278 Downpipes and Exhaust, E550 AWD

    Weistec Engineering offers True Downpipes for M157 AMG and M278 powered vehicles. Replacing the small and restrictive factory downpipes delivers significant gains in power, throttle response, and exhaust tone.

    Engineered and designed with the most sophisticated Computer Aided Design tools, excellent fitment and the highest performance possible are guaranteed. Each downpipe has a specially designed CNC machined turbo outlet flange, transitioning into a 3 inch pipe and low profile V-Band flanges to mate with our Midpipes.

    Downpipes come standard with external Titanium Ceramic Coating and internal Copper Ceramic coating to keep heat inside the piping, helping improve exhaust velocity and reduce engine bay temperatures.

    Branded Weistec stainless steel heat shields are also included to block rising heat from the exhaust manifold.

    Our Biturbo Midpipes bolt to the Downpipes using a low profile V-Band flange and transition to the factory axle-back. Each Mid-pipe has stainless steel brackets for solid bolt-in fitment and is made of 3 inch stainless steel piping creating a very high flowing quality exhaust system.

    Complete exhaust system includes Downpipes, Midpipes, Heat Shields, Gaskets, and Hardware.

    *Product may not be emissions compliant.  Check local laws prior to installation.

    Key Features:

    • 100% mandrel bent and TIG welded

    • Constructed of low carbon 304 Stainless Steel

    • Stainless steel heat shields offer the Weistec look and function

    • Bolt-on installation

    • Low Profile Engine Mounts

    • CNC Machined Billet Aluminum Engine Mount Brackets

    • Improved exhaust note

    • Improved exhaust flow

    PDF Filem157_exhaust_install_w212_w218_awd_2 (859.9 KB)Download


    This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
    Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website.
    It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
    All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.


    WARNING: Cancer and Reproductive Harm