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MBRP 3 in. Off-Road Downpipe (15-20 EcoBoost)

Item 398090
AmericanMuscle no longer carries the MBRP 3 in. Off-Road Downpipe (15-20 EcoBoost). Please check out 2015-2020 Mustang Downpipes for an updated selection.
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Features, Video & Details

  • MBRP 3” Off-Road Down Pipe
  • Directly Replaces Factory Pipe
  • Delivers Aggressive Exhaust Note
  • Augments Torque and Horsepower on Rear Wheel
  • Smooth Pipe Bends Enhance Exhaust Flow
  • Heavy-Duty Steel Construction
  • Precision CNC Machining on 3” Mandrel-Bent Tubing
  • Rust-Resistant Finish
  • Direct Bolt-On Installation
  • Limited Warranty
  • Is NOT CARB Certified
  • Fits All 2015-2020 Ford Mustang EcoBoost Models

Review & Installation Video

Review & Install Video

Augmented Horsepower. The MBRP 3-inch Off-Road Down Pipe is the perfect addition for augmenting rear wheel torque and horsepower on your Ford Mustang EcoBoost. This direct replacement pipe will deliver an aggressive exhaust note in your vehicle that will definitely get your Mustang the attention that it deserves! It provides enhanced air flow due to the smooth pipe bends.

Precision Machining. Precision CNC machining is used to make the 3-inch mandrel bent tubing of this pipe. It will have a perfect fit with your vehicle model. It is manufactured from heavy-duty steel that has a rust-resistant finish.

Direct Bolt-On. You will love the easy, direct bolt-on installation of this MBRP down pipe. All required hardware is included.

Limited Warranty. The limited warranty from MBRP covers any structural defects in this off-road down pipe. Some exclusions may apply to this warranty, so review all the details for more information.

Application. The MBRP 3-inch Off-Road Down Pipe was designed to fit all 2015-2020 Ford Mustang EcoBoost models. Customized calibration is required after installing this off-road down pipe. These pipes are recommended for off-road driving only since they have been designed without a catalytic converter.

Fitment: Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Off-Road Downpipe
  • Hardware for Mounting
  • Installation Directions
Installation Info
Tech Specs
Will it fit my Mustang?

    Customer Photos (1) Submit Your Photo

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      Questions & Answers (15)

      5 Top Rated Questions

      Will this fit my Borla atak catback on my 2017 mustang ecoboost?

      • Yes, this down pipe will work with the Borla cat-back exhaust.

      Helpful (1)

      Does this down pipe can install with mbrp cat back exhaust ? Or do i need to have adapter

      • The MBRP 3 in. Down Pipe will mount to an MBRP Cat Back Exhaust without the need of an adapter.

      Helpful (1)

      I have the MBRP 3in street catback on my 19 EcoBoost, will i need an adapter to make it a true 3" from the turbo back? Otherwise it looks like it steps down to make the connection

      I have a Flowmaster resonator delete y-pipe on mine. Will this fit into that without any issues?

      Does this fit with the MBRP cat back y-pipe race version?

      • Yes, this downpipe is compatible with the MBRP race cat-back exhaust with a y-pipe. 

      Helpful (0)
      Post Your Question
      10 More Questions
      Will the Cobb access port work as a tune for the downpipe? 1 answer
      Will it need extra hardware to fit up to Magnaflow Catback exhaust? 1 answer
      Does this downpipe will fit on Borla ATAK cat back exhaust? Also what is the difference between this and Borla off road downpipe? 1 answer
      Will it set off the check engine light? 1 answer
      Does Bama offer tunes for a catless downpipe? 1 answer
      Does Bama offer a tune for the catless downpipe? 1 answer
      Can i use this down pipe even though i dont have a tune? And do you know what would happen if i drive with out a tune for a while? 1 answer
      Does this downpipe come with adapters to work with either stock (2.25") exhaust and the MBRP Cat exhaust system or any other 3" exhaust system? 1 answer
      Since this is a catless down pipe, where would I place the sensor? 1 answer
      Does this downpipes require a tune? 1 answer

        Customer Reviews (11) Write a Review

        Overall Rating 4.5

        out of 5 stars

        Installation Time:Afternoon

        Installation Cost:0-$100

        • Loudness / Volume 4.545455 4.5
        • Exhaust Note 4.454545 4.5
        • Fit & Finish 4.181818 4.2
        • Bang For Your Buck 4.636364 4.6

        • 5/5

          Installation Time: Afternoon

          March 06, 2019


          I will tell everyone why they don’t show a video of install or dyno with the MBRP down pipe mated to the MBRP racing exhaust. LOUD!!! Hooligan wake your neighbors up gunshot loud! Personally, I absolutely love them together. The symphony makes me feel like a teenager again. Like every time I start it I know I’m doing something wrong. However, there is a huge difference in noise when running in normal mode versus sport. Normal allows you to drive at about half the decibels. And a perfect fitting exhaust system that took minimal install effort with another set of hands.


          Year: 2015 Submodel: EcoBoost

          Helpful (1)

        • 5/5

          Installation Time: Afternoon

          January 17, 2019

          Day and night

          I already had the mbrp race cat back, witch sounds good, but as soon as I installed the down pipe... WOW! It sounds amazing. It’s loud yet still a deepish tone, witch could be my favorite part. 10/10 Would Recommend


          Year: 2015 Submodel: EcoBoost

          Helpful (1)

        • 2/5

          Installation Time: Afternoon

          December 20, 2018

          MBRP downpipe

          Fitment issues with connecting to stock exhaust the clamp loosens up and exhaust leak develops. The flex pipe also has holes in it already after very limited use.


          Year: 2016 Submodel: EcoBoost

          Helpful (5)

        • 5/5

          Installation Time: Less than 1 Hour

          November 20, 2018

          Great power adder

          Install was easy and the turbo spools up so much faster without cats


          Year: 2018 Submodel: EcoBoost

          Helpful (2)

        • 3/5

          Installation Time: Afternoon

          May 05, 2018

          Good sound but strong smell

          This was the last part of the exhaust system I changed out. I started with axle backs and a Y pipe. It sounded alright but was still pretty quiet. The catless down pipe made the engine and turbo a lot louder on start up and in the upper RPMs, which is nice. There also isn't any drone on the highway. The downside is that you will have a strong gasoline smell. It doesn't bother me too much since I use to daily drive a 1966 mustang but my girlfriend and family don't like it. Overall it does improve the exhaust note and make it louder but you will have to accept the gasoline smell and not being able to pass inspection. You will also have a check engine light unless you get a custom tune or use a non-fouler.


          Year: 2015 Submodel: EcoBoost

          Helpful (7)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: 0-$100

          March 31, 2018

          Great performance, sound and price

          I had an after market 3" setup with the stock downpipe and cats removed was alright, this piece slid right on and allowed me to adapt to mine where needed. Gave it a deeper sound and had solid construction, can't imagine a more expensive one doing any better.


          Year: 2016 Submodel: EcoBoost

          Helpful (5)

        • 5/5

          Installation Time: Afternoon

          March 20, 2018

          Love it

          The sound with a full flow master exhaust is absolutely insane could not be happier and with a tune the car preforms great


          Year: 2017 Submodel: EcoBoost

          Helpful (6)

        • 5/5

          Installation Time: Less than 1 Hour

          November 30, 2017

          Excellent downpipe.

          This downpipe installed very easily. Using jack stands I installed it in about 90 minutes. Fit was excellent and the sound is great. No drone at all. I have it paired with the MBRP Race exhaust. On a stage 3 Cobb tune with an ETS intercooler and HPS cold air intake, the car is very quick and sounds great. Lots of turbo and BOV noise.


          Year: 2017 Submodel: EcoBoost

          Helpful (11)

        • 5/5

          November 26, 2017


          I definitely feel the difference from stock down pipe throttle wise mu cat pull faster than before and i love the sound of it, paired with flowmaster axle back and 3in customized ypipe roush cold air intake and a tune i rum 13.3 best 1/4 mile with slicks


          Year: 2016 Submodel: EcoBoost

          Helpful (7)

        • 5/5

          Installation Time: Afternoon

          November 17, 2017


          If you're on the fence about choosing this down pipe, I say go for it! I had MBRP's 3" Race Series Cat-back, so I decided on this down pipe hoping it would compliment the deep sound of the cat-back. It did! The volume increase isn't super noticeable while idling or driving slow, but once you get on the throttle, this down pipe sounds amazing! It still sounds deep but with a nice raspiness to it. I drove my car home without tuning and there was a difference in power. Awesome down pipe


          Year: 2015 Submodel: EcoBoost

          Helpful (8)

        • 5/5

          Installation Time: Afternoon

          November 02, 2017


          Awesome downpipe!!! The increased HP and TORQUE are noticeable especially after being tuned..


          Year: 2017 Submodel: EcoBoost

          Helpful (9)

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