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Cobb 3 in. Cat-Back Exhaust (15-18 EcoBoost Fastback)

Item 390951
AmericanMuscle no longer carries the Cobb 3 in. Cat-Back Exhaust (15-18 EcoBoost Fastback). Please check out 2015-2020 Mustang Cat-Back Exhaust for an updated selection.
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Features, Video & Details

  • Improves Exhaust Flow for Sound and Power
  • Durable 304 Stainless Steel Construction
  • Free Flowing 3 inch Diameter Mandrel-Bent Tubing
  • 10 inch Resonator and Mufflers Included
  • 4 inch Polished Stainless Tips w/ Cobb Logo
  • Includes 2.25 inch to 3 inch Step Up Adapter
  • Compatible with Factory or Cobb 3 inch Down Pipes
  • Fits 2015-2018 2.3L EcoBoost Fastback Mustangs

Review & Installation Video

Review & Install Video

Power and Performance. Are you looking to enhance the power and performance of your turbocharged 2.3L Mustang? Of course you are, so check out Cobb's EcoBoost Cat-Back Exhaust System. Featuring 3 in. mandrel bent tubing to eliminate kinks, a high flow 10 in. mid pipe resonator and a pair of straight through mufflers, this Cat-Back will considerable improve your EcoBoost's exhaust flow. By improving exhaust flow you will see a noticeable increase in horse power, torque and engine response across the entire power band.

Aggressive Throaty Sound. A Cobb Cat-Back will not only improve the power and performance of your EcoBoost Mustang, but it will also improve your Pony's sound as well. Designed to amplify the sound of your Mustangs turbocharged engine, this Cobb Cat-Back will add an aggressive throaty exhaust note without any unwanted drone via a 10 in. mid pipe resonator. This Exhaust is perfect for those EcoBoost owners who think the stock exhaust system is just too quiet and want to shake things up.

Quality Construction. Cobb constructs their Cat-Back Exhaust from 3 in. diameter mandrel bent T304 stainless steel tubing for superior strength and long lasting corrosion resistance. The system includes a Y-pipe, 10 in. mid pipe resonator and two straight-through mufflers that end with polished dual-walled 4 in. tips. As an added bonus the tips are etched with the Cobb logo for impressive custom styling.

2.25 in. to 3 in. Adaptor Included. This Cobb 3 in. Cat-Back can be installed with a Cobb 3 in. Down Pipe, as well as the factory 2.25 in. Down Pipe with the use of the included 2.25 in. to 3 in. step-up adapter. This adapter allows you to conveniently upgrade your EcoBoost Mustang over time as your budget allows.

Direct Bolt-On Installation. Cobb engineered their Cat-Back to be a direct bolt-on upgrade replacement for your EcoBoost Mustang's factory exhaust system. There is no cutting or extra modifications required. Installation of this Cobb Exhaust can be completed in about a two hours with just basic hand tools.

Application. This Cobb 3 in. Cat-Back Exhaust System is specifically designed to fit 2015-2018 Fastback EcoBoost Mustangs equipped with the turbocharged 2.3L in-line 4-cylinder engine. Does not fit convertible models.

Please Note. This Cat-Back Exhaust System is for use on EcoBoost Mustangs with the factory 2.25 in. down pipe or a Cobb 3 in. Down Pipe Kit installed.

Fitment: Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) 2.25” to 3” Downpipe Adapter
  • (1) 3" Y Pipe with Resonator
  • (1) Driver Side Muffler Assembly with Exhaust Tip
  • (1) Passenger Side Muffler Assembly with Exhaust Tip
  • (3) Exhaust Gaskets
  • (6) Bolts
  • (6) Nuts
Installation Info
Tech Specs
Catback Exhaust Specifications
Piping Material:T304 Stainless Steel Tip Material :Polished Stainless Steel
Piping Size:3" (includes 2.25" to 3" step up adapter)Tip Size:4"
Muffler Type:Straight-throughFitment:2015-2017 EcoBoost
Will it fit my Mustang?

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        Customer Reviews (1) Write a Review

        Overall Rating 5

        out of 5 stars

        Installation Time:Afternoon

        • Loudness / Volume 5 5
        • Exhaust Note 5 5
        • Fit & Finish 5 5
        • Bang For Your Buck 5 5

        • 5/5

          Installation Time: Afternoon

          November 02, 2016

          This exhaust will wake up the neighbors

          I love the sound of this exhaust and the quality is well. It looks and sounds very good.


          Year: 2016 Submodel: Ecoboost

          Helpful (8)

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