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    Home / Products / BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i
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    BMW B58 TURBO BACK EXHAUST SYSTEM - M240i/340i/440i

    $997.00$1,171.00

    • 30 Day Money-Back Guarantee | IN STOCK


    B58 DOWNPIPES

    The ARM B58 Downpipe is one of the foundational upgrades for giving your B58-powered BMW more power, torque, and sound.  We offer THREE different versions of the B58 downpipe. Those versions include, 4.5in Downpipe, 6in Downpipe, and 6in Catted Downpipe. The stock B58 downpipe comes from the factory with a catalyst that severely restricts exhaust flow, causing excessive backpressure with increased boost.  Upgrading your downpipe unlocks power, improves turbo spool, allows you to safely run stage 2+ tuning, all while increasing the sound of your B58-powered BMW. 



    B58 MIDPIPE UPGRADE

    The ARM M240i/340i/440i Midpipe significantly improves the sound of your B58, giving it the aggressive exhaust note you're looking for from a tuned B58-powered BMW. Designed to amplify the power and sound of your B58, the ARM M240i/340i/440i Midpipe eliminates the two central resonators found in the stock M240i/340i/440i midpipe.  By retaining the OEM muffler you still have the ability to control the volume of your exhaust.  Switch your car into Sport Plus and enjoy the sounds of the upgraded B58 sing, or flip it into comfort mode to drive through the neighborhood.  You can select the ARM Single Exit Exhaust option to turn your ARM M240i/340i/440i Midpipe into a full 3.25" straight-piped system, for maximum volume and weight savings.

    B58 SINGLE EXIT EXHAUST

    The ARM M240i/340i/440i Single Exit Exhaust is the final step in your M240i/340i/440i exhaust modifications. This is for the all-in M240i/340i/440i enthusiast, seeking the lightest and loudest exhaust available.  You will see significant weight savings and an engine note that SCREAMS. 

    The ARM M240i/340i/440i Single Exit Exhaust connects to the end of the ARM M240i/340i/440i Midpipe, extending the 3.25" midpipe all the way to a passenger-side single exit tip.




    IN THE BOX

    • 1x ARM B58 Single Exit Exhaust
    • 1x Exhaust Clamp
    • ARM B58 Downpipe
    • 1x ARM B58 Midpipe Front Section
    • 1x ARM B58 Midpipe Rear Section
    • 4x Exhaust Clamps
     

    FITMENT GUIDE

    Make Model Submodel Engine
    BMW F22 M240i B58 3.0L
    BMW F22 M240i xDrive B58 3.0L
    BMW F23 M240i B58 3.0L
    BMW F23 M240i xDrive B58 3.0L
    BMW F30 340i B58 3.0L
    BMW F30 340i xDrive B58 3.0L
    BMW F30 M340i B58 3.0L
    BMW F30 M340i xDrive B58 3.0L
    BMW F32 440i B58 3.0L
    BMW F32 440i xDrive B58 3.0L


    ARM MOTORSPORTS LIFETIME WARRANTY

    Every ARM Motorsports product is backed by a lifetime warranty which is automatically issued at the time of purchase. Your warranty protects you against any defects in craftsmanship. The warranty entitles you to a replacement unit.


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