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Cobb 3 in. Catted Downpipe (15-20 EcoBoost)

Item 390954
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Improves Exhaust Flow for More Power
      • Aggressive Throaty Sound
      • 304 Stainless Steel Construction
      • Free Flowing 3 inch Diameter Mandrel-Bent Tubing
      • High Flow Catalytic Converter
      • Includes 3 inch to 2.25 inch Step Down Connecting Pipe
      • Computer Tune Required
      • Intended For Off-Road, Track Use
      • Is NOT CARB Certified
      • Designed for use with the Factory 2.25 inch Cat-Back Exhaust
      • Fits all 2015-2020 2.3L EcoBoost Mustangs


      Power and Performance. Unleash the powerful beast lurking in your Ecoboost's turbocharged engine by upgrading to a Cobb 3" Catted Down Pipe. Larger than stock, this Cobb 3" Down Pipe features a high flow catalytic converter to dramatically improve your Mustangs exhaust flow. With a freer flowing Down Pipe installed you will see a significant improvement in both power and performance. This 3" Down Pipe was designed with a 2.25" connecting pipe, so it will bolt directly up to your factory cat-back system.

      Aggressive Throaty Sound. Cobb's 3" to 2.25" Down Pipe will not only increase the horse power and torque of your EcoBoost Mustang, but it will also increase your Pony's sound as well. This Down Pipe will add a much more aggressive and throaty exhaust note to the sound of your turbocharged Mustang, when compared to the original factory down pipe.

      High Quality Construction. Cobb manufactures their Down Pipe from high quality T304 stainless steel for superior strength and long lasting corrosion resistance. Fabricated from 3" diameter, smooth mandrel bent tubing, this Down Pipe features a 200 cell count metal spun catalytic converter for optimal exhaust flow. Cobb's Downpipe also features two standard O2 fittings for use with the factory upstream and downstream O2 sensors.

      Calibration Required. Installation of this Cobb Down Pipe will require the use of a Handheld Tuner to reprogram the vehicles computer (ECU) for operation. By reprogramming your Mustangs ECU you will be able to realize the full power potential that this Down Pipe has to offer.

      Application. This Cobb 3" to 2.25" Catted Down Pipe is specifically designed to fit the 2015-2020 EcoBoost Mustangs equipped with the turbocharged 2.3L in-line 4-cylinder engine. This Down Pipe can be installed with either the factory or an aftermarket 2.25" Cat-Bback exhaust System.

      Technical Note. This product 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.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 5M2200

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (1)

      Write a Review

      Ratings Summary

      5 out of 5 overall rating from 1 customers

      • August 30, 2016

        5 2015 Ecoboost - kevin

        Great Product!

        I've been looking for a catted down pipe for a while now and this product is excellent. I've never been happier with my vehicle. Remarkable purchase. Thanks American Muscle!

        Helpful (11)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      Will this be able to work with my stock exhaust and the BAMA X4/SF4 Power Flash Tuner?

      • This will work with a stock Catback system and does require a custom tune to be written for them.

      Helpful (0)

      Can this product be compatible with a 2.5in aftermarket exhaust? If so, will an adapter be necessary?

      • The Cobb 3 in. Down Pipe - Catted is necked down at the end to accept OE sized cat back exhausts.

      Helpful (0)

      I saw it required a tune after install... if you are currently running the cobb of the shelf tune stage 3 would that work??????????

      • The Cobb Catted 3 in. down pipe (15-17 EcoBoost) Will require a tune after installation. The Cobb access port will be able to work with the down pipe. Simply just download the the tune from Cobb's website onto your access port.

      Helpful (0)
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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Catted Down Pipe

      Tech Specs

      Down Pipe Specifications
      Piping Material:304 Stainless SteelPiping Size:3" (Steps down to 2.25")
      Catalytic Converter:Yes - IncludedFitment:2015-2017 EcoBoost

      Will It Fit My Mustang

      • EcoBoost - 15, 16, 17, 18, 19, 20

      Designed for use with the factory or an aftermarket 2.25" Cat-Back Exhaust.

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