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MBRP 3 in. Down Pipe - Catted (15-18 EcoBoost)

Market Price $492.99 You Save 12% ($58.00)
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$434.99 (each)

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  • Item 398091
  • MPN# FGS017

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    Features, Video & Details

    • Improves Rear Wheel Torque and Horsepower
    • Creates a Bold Exhaust Tone
    • High Flow Catalytic Converter Included
    • 3” Catted Down Pipe
    • Stainless Steel Mandrel-Bent Tubing
    • Direct Replacement for OEM Pipe
    • Limited Warranty
    • Fits 2015-2018 2.3L EcoBoost Mustangs with a 2.25" Cat-Back Exhaust

    Review & Installation Video

    Review & Install Video

    Improves Power and Performance. Uncork the hidden power of your 2015-2018 EcoBoost Mustang by upgrading to a MBRP 3" Catted Down Pipe. The innovative design and high flow catalytic converter will effectively improve exhaust flow for an increase in rear wheel horsepower and torque.

    Bold Exhaust Tone. Besides improving the power and performance of your EcoBoost Mustang, this MBRP Down Pipe will improve your Pony's sound as well. Because of the Pipes larger diameter, you will gain a much bolder exhaust note when compared to the original factory down pipe.

    Durable Construction. MBRP uses only the highest quality materials to manufacture their products. You can trust the quality and craftsmanship of this catted down pipe as it is made from mandrel bent 3" stainless steel tubing to ensure extra durability. This Downpipe features two standard O2 fittings for both upstream and downstream O2 sensors.

    Direct Bolt-On Installation. MBRP designed their Down Pipe to be a direct bolt-on upgrade replacement for your Mustang's factory down pipe. There is no cutting or extra modifications required. Installation of this new Down Pipe can be completed in about a three hours with just basic hand tools.

    No Tune Required. This Downpipe was designed to improve the performance of your Mustang without the need of reprogramming your computer. Even though a re-tune is not required for operation, AmericanMuscle recommends a custom tune with a Handheld Tuner. By reprogramming the vehicles computer (ECU) you will get the best possible power and performance increases from this Down Pipe.

    Not CARB Certified. This Downpipe is not CARB certified, therefore it is not legal for use in California or any other state adopting California emission standards. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

    Limited Warranty. MBRP offers customers a limited warranty which covers manufacturing defects in material and workmanship. Some exclusions may apply, please see manufacturer's warranty for details.

    Application. This MBRP Catted 3" Down Pipe is specifically designed to fit 2015-2018 EcoBoost Mustangs equipped with the turbocharged 2.3L in-line 4-cylinder engine and a 2.25" cat-back exhaust system.

    Fitment: 2015 2016 2017 2018 Details

    What's in the Box
    • (1) Catted Downpipe
    • Mounting Hardware
    • Installation Instructions
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    8 Questions / 8 Answers

    Ask a Question

    Hi, I have a 2015 Mustang Ecoboost and I am planning on ordering the MBRP XP Street Exhaust early next month. I want to keep the same manufacturer going all the way through the exhaust system, so I am now looking at the MBRP catted downpipe. Do these products fit directly to each other as well as with the factory hook ups? Are there any extra parts or adaptors needed or is everything that will be needed for install included with the purchase of these two products? The goal is to have everything ready for my mechanic on the day of install? Thank you!


    • The MBRP 3 in. Down Pipe would hook up very nicely with the MBRP XP series cat-back and would not require anything else for the install.


    Helpful (1)

    I just ordered the MBRP Race catback and decided to get the MBRP Catted Downpipe with it because the black friday price was too good to pass up. I do not have a tuner yet and might not be able to get one for a few months, is it safe to run the Down pipe and catback on a stock tune for a long period of time? The only other mod is a BOV adapter.


    • A tune is certainly not required with the install of this MBRP 3 inch Down Pipe so it would indeed be safe to drive the Mustang without the tune.


    Helpful (1)

    Will it pass emissions in Texas ?


    • We recommend contacting a local emissions inspection station to verify emissions legality of the MBRP 3 in. Down Pipe in your area.


    Helpful (0)

    Does this item pass emissions? Will it work with a magnaflow competition catback exhaust?


    • This MBRP 3 in. Down Pipe is not CARB certified, therefore it is not legal for use in California or any other state adopting California emission standards but will work with the Magnaflow Cat-back that accepts 2.25" exhaust.


    Helpful (0)

    Will this fit a Borla ATAK Catback installed on my Stang?


    • The MBRP 3 in. Down Pipe will work with the Borla ATAK Cat-Back Exhaust, item # 387466, (


    Helpful (0)

    Will this pass state inspection


    • As it can vary per state, we generally recommend contacting your state in regards to the inspection/emissions regulations and if a specific part will pass.


    Helpful (0)

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    Customer Reviews (3) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 4.333333 4.3
    • Exhaust Note 4.666667 4.7
    • Fit & Finish 5 5
    • Bang For Your Buck 5 5

    • 5/5

      Installation Time: Afternoon

      May 27, 2018

      Easy Install

      Definetly pairs well with the MRBR race inch exhaust. Most people don't believe its a 4 cylinder. Buddy of mine installed this plus the race exhaust on jacks in about two hours... he's also 17.


      Year: 2017 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      May 08, 2018


      the sound difference was incredible the performance is awesome


      Year: 2015 Submodel: EcoBoost

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      September 17, 2017


      Easy install only took me 2 hours with a jack and stand. Performance is great with a tune my car runs a lot better


      Year: 2017 Submodel: EcoBoost

      Helpful (3)

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