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    M156 ROW Airbox Set


    Availability: In stock


    M156 ROW Airbox Set

    From the factory, Mercedes AMG vehicles with the US Spec M156 engine are equipped with charcoal filters installed in the upper halves of the airboxes. To make room for the charcoal filters, the mass air flow sensor housing has a restrictive profile. Non US Spec M156 airboxes, commonly nicknamed ROW Airboxes (Rest of the World) do not contain charcoal filters and are manufactured with a much higher flowing mass air flow sensor housing profile.

    Installation is quick and simple as the ROW Airboxes are a direct replacement for the factory US spec airboxes. Upon starting the engine it will be apparent that the engine is breathing more freely as it will have a more aggressive sound note, better throttle response, and improved power band.

    Vehicles with a Stage 1 or Stage 2 M156 Supercharger System greatly benefit from the improved flow characteristics of the ROW Airboxes. For Stage 3 systems, the ROW Airboxes are a requirement.

    The ROW Airboxes come in a set of two, both left and right sides, and include brand new mass air flow sensors.

    For maximum results, the combination of our M156 ECU Upgrade and M156 High Flow Air Filters is recommended.

    Key Features:

    • Adds 5-10 Horsepower

    • Increased Flow Area

    • Amplifies performance of your Weistec Supercharger or ECU Tune

    • Set of 2

    • Removes Charcoal Filters

    • Includes New MAF Sensors

    No files available.


    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