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Mishimoto Cat-Back Exhaust (15-17 EcoBoost)

Market Price $1,047.99 You Save 17% ($174.99)
Our Price

$873.00 (each)

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  • Item 393696
  • MPN# MMEXH-MUS4-15

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Features, Video & Details

  • Strong 304 Stainless Steel Construction
  • 3" to 2.5" Mandrel-Bent Tubing
  • 4.5" Double Wall Polished Tips
  • Aggressive Tone without Drone
  • Mates w/ Stock or Most Aftermarket Down Pipes
  • Compatible with Manual & Automatic Transmissions
  • Fits 2015-2017 EcoBoost Mustangs

Review & Installation Video

Review & Install Video

Volume and Tone. Improve the volume and tone of your EcoBoost Mustang while avoiding that annoying drone with this Cat-Back Exhaust from Mishimoto. Specially designed with twin oval mufflers and larger, mandrel-bent piping, you'll notice the difference in sound quality immediately. The 4.5" polished stainless steel tips are sure to enhance the visual appeal at the rear of your 2015-2017 EcoBoost Mustang.

Quality Construction. Mishimoto, a global leader in performance cooling products, manufactures this exhaust system with 304 mandrel-bent stainless steel that has been TIG-welded to perfection. The 3" to 2.5" split of this Cat-Back Exhaust helps ensure the right exhaust velocity and with limited bends, the exhaust air flows freely. For the viewing pleasure of the guy trying to catch up to you, the system ends with two 4.5" double wall polished tips.

In the Box. You'll find everything you need for a simple installation with this Mishimoto Cat-Back Exhaust System. Being a direct fit for your factory cat-back, no additional modifications will be required. For optimal performance, it is recommended to upgrade your down pipe to the Mishimoto 3" Down Pipe (sold separately). Please see the ordering options above.

Application. The Mishimoto Cat-Back Exhaust is specifically designed to fit 2015-2017 EcoBoost Mustangs, equipped with either manual and automatic transmissions. Please note, this exhaust will only mate to a stock down pipe or an aftermarket down pipe with a 2.25" outlet.

Technical Note. This Cat-Back Exhaust system will not fit on convertible models, unless the underbody brace is removed prior to installation.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (1) SS Front Pipe w/ Slip Joint Connection
  • (1) SS Y-Pipe w/ Slip Joint Connections
  • (2) SS Oval Mufflers
  • (2) 4.5” Double Wall Polished Tips
  • (1) 3” Slip Joint Clamp
  • (2) 2.25” Slip Joint Clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: 304 Stainless Steel Tip Material: Polished Stainless Steel
Piping Size: 3" to 2.5" Tip Size: 4.5" Double Wall
Muffler Type: Specially-Selected Oval Fitment: 2015-2017 EcoBoost
Will it fit my Mustang?
  • EcoBoost - 15, 16, 17

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Lots of heat; Nice sound

Ordered this system for my wife's '16 Ecoboost. Had it professionally installed with no issues at all. After a couple months, we noticed the red reflector above the driver's side exhaust tip was curling ...

Read More
Helpful (1)

5/5
Sounds good, no drone

Very good system, no drone at all. Sounds good for a 4banger with a little anger. Buddy has these

Helpful (0)

Overall Rating 3.7 out of 5 stars
Read All 3 Reviews

Customer Photos

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1 Questions / 1 Answers

Ask a Question

I have the 2017 ecoboost convertible will this install on my Mustang and be able to reinstall the underbody brace

BobbyW

  • This Cat-Back Exhaust system will not fit on convertible models unless the underbody brace is removed prior to installation. This would not allow for the brace to be reinstalled with out custom fabrication.

    Ricky36

Helpful (0)

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Customer Reviews (3) Write a Review

Overall Rating 3.7

out of 5 stars

  • Loudness / Volume 5 5
  • Exhaust Note 5 5
  • Fit & Finish 2.5 2.5
  • Bang For Your Buck 5 5



  • 5/5

    May 12, 2017

    Lots of heat; Nice sound

    Ordered this system for my wife's '16 Ecoboost. Had it professionally installed with no issues at all. After a couple months, we noticed the red reflector above the driver's side exhaust tip was curling inward, toward the centerline of the car, from the exhaust heat. Dealer replaced the curled reflector under warranty. All was OK for awhile, then we noticed same reflector curling again and the passenger side reflector just starting to curl also. This time, we had dealer remove both reflectors. We're now trying to figure out what to put in the space where the reflectors sat. (C'mon after-market guys!) Not unsightly or noticible unless you're looking; would only bother a hard core Mustang owner. No problems since removing the reflectors. Probably a combination of Ford not considering the heat of after-market exhaust systems and Mishimoto not designing the system's exhaust tips to exit further out from the valence, like the factory system tips did. All that said, a great system overall and it adds a great exhaust note to the car. Wife picked out the system and she's happy.

    Daadindi

    Year: 2016 Submodel: EcoBoost

    Helpful (1)

  • 1/5

    May 22, 2017

    Attention Convertible Owners

    This product requires you to permanently remove the floor pan bracing underneath the vehicle. Convertibles obviously remove the roof of the vehicle and the structural stability it provides. I spoke with Ford performance and my local Ford dealer - they both said the following. The floor pan braces are designed to prevent the frame from twisting. If the floor pan braces are removed, the frame is much more susceptible to damage. Mishimoto hasn't responded to my question as to whether they sought guidance from Ford when they were designing this system for use on both the fastback and convertible. I'm very surprised Mishimoto and American Muscle would sell a product that requires the the permanent removal of crucial structural components on a vehicle.

    WheelmanM80

    Year: 2016 Submodel: EcoBoost

    Helpful (0)

  • 5/5

    September 08, 2016

    Sounds good, no drone

    Very good system, no drone at all. Sounds good for a 4banger with a little anger. Buddy has these

    Shelby1000

    Year: 2016 Submodel: GT

    Helpful (0)

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