Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win A 700+ HP 2018 RTR Mustang Enter Now!

Mishimoto Cat-Back Exhaust (15-18 EcoBoost)

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

$873.00 (each)

FREE Shipping
  • Item 393696
  • MPN# MMEXH-MUS4-15

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Will this fit your Mustang?

Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features, Video & Details

    • Aggressive Tone without Drone
    • Improves Exhaust Flow for More Power
    • Strong 304 Stainless Steel Construction
    • 3" to 2.5" Mandrel-Bent Tubing
    • Polished 4.5" Double Wall Exhaust Tips
    • Direct Bolt-On Upgrade
    • Compatible with Manual & Automatic Transmissions
    • Fits 2015-2018 EcoBoost Fastback 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 2015-2018 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 2015-2018 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 2018 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?

    People Who Bought This Item Also Bought

    Customer Photos

    You Might Also Like

    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


    • 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.


    Helpful (0)

    More Products You Might Like

    Customer Reviews (4) Write a Review

    Overall Rating 4.0

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 4.333333 4.3
    • Exhaust Note 5 5
    • Fit & Finish 3.333333 3.3
    • Bang For Your Buck 5 5

    • 5/5

      Installation Time: Afternoon

      March 04, 2018

      Favorite Sounding Ecoboost!

      I really appreciate the build quality, especially for the price. This is the smoothest sounding exhaust I have ever heard on an ecoboost. Not raspy or whiny at all. very deep and strong sounding. Paired with an aftermarket downpipe, this exhaust would probably be perfect. It is middle of the road for volume, a downpipe would probably raise the loudness to a perfect level and add a touch of raspy growl.


      Year: 2015 Submodel: EcoBoost

      Helpful (0)

    • 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.


      Year: 2016 Submodel: EcoBoost

      Helpful (1)

    • 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.


      Year: 2016 Submodel: EcoBoost

      Helpful (2)

    • 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


      Year: 2016 Submodel: GT

      Helpful (1)

    Related Mustang Categories