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Stainless Works Cat-Back Exhaust w/ Y-Pipe (15-19 EcoBoost Fastback w/ SW Downpipe)

Market Price $1,313.16 You Save 12% ($151.07)
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  • Item 387447

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    Features & Details

    • Aggressive Muscle Car Exhaust Note
    • Y-Pipe and Retro Styled Chambered Mufflers Included
    • 3" Diameter Mandrel-Bent Stainless Steel Tubing
    • Mirror Polished 304 Stainless Steel Slash Cut Tips
    • Direct Fit Replacement Upgrade
    • Designed and Manufactured in the USA
    • Not Compatible with Active Exhaust
    • Fits 2015-2019 EcoBoost Fastback Mustangs with 3" Stainless Works Down Pipe
    Aggressive Exhaust Note. Add a more aggressive exhaust note to your turbocharged S550 EcoBoost Fastback Mustang with a Stainless Works 3" Retro Chambered Cat-Back Exhaust System. This catback not only sounds great, but also improves exhaust flow with the included Y-pipe for an increase in rear wheel horsepower and torque.

    Stainless Steel Construction. Constructed in the USA from mandrel bent full 3" diameter 304 stainless steel tubing for strength and superior corrosion resistance, this Stainless Works Mustang Cat-Back exhaust system features two round retro chambered mufflers that end with mirror polished 304 stainless steel slant cut resonator exhaust tips.

    Direct Fit Upgrade. This Stainless Works Mustang Cat-Back with Y-pipe includes all the hangers and clamps needed to bolt straight up to Stainless Works Performance Down Pipe without any modifications required, making it a direct fit, bolt-on replacement upgrade.

    Application. This Stainless Works 3" Retro Chambered Cat-Back with Y-Pipe is specifically designed to fit the 2015-2019 EcoBoost Fastback Mustang without the Active Valve Exhaust and will require the use of a Stainless Works 3" Performance Down Pipe in order to be installed properly (see drop down option above). Not compatible with convertibles.

    Fitment: 2015 2016 2017 2018 2019 Details


    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Mid-pipe
    • (2) Connection Pipes
    • (2) Over-Axle Pipes
    • (2) Mufflers
    • (2) Slash Cut Tips
    • Clamps
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: Stainless Steel Tip Material : Polished 304 Stainless Steel
    Piping Size: 3" Tip Size: 4"
    Muffler Type: Chambered Fitment: 2015-2017 EcoBoost Fastback
    Will it fit my Mustang?

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    Questions & Answers (6)

    5 Top Rated Questions

    Will this not work with a stock downpipe???

    • This Stainless Works 3" Retro Chambered Cat-Back with Y-Pipe is specifically designed to fit the 2015-2017 EcoBoost Fastback Mustang and will require the use of a Stainless Works 3" Performance Down Pipe in order to be installed properly. This will not work with the original factory Down Pipe.

    Helpful (0)

    Does it come with the downpipe?

    • No, The Stainless Works Cat-Back Exhaust w/ Y-Pipe for the 15-17 EcoBoost Fastbacks will not come with the Down pipe in this kit. We do offer the down pipe in the drop down section to add to your order which we offer both catted and Off road. Catted: Off-road:

    Helpful (0)

    It says with SW Downpipe. Does the 3 inch downpipe come included with the purchase of theexhaust?

    • The Stainless Works Cat-Back Exhaust w/ Y-Pipe does not include the Stainless Works 3 inch Down Pipe. It is listed to show that it is specifically designed to work on 15-17 EcoBoost Fastbacks with the SW 3 inch down pipe already installed.

    Helpful (0)

    Is this a full 3" system with the downpipe?

    • The Stainless Works Cat-Back Exhaust w/ Y-Pipe is a full 3" system when used with the 3" Stainless Works Down Pipe.

    Helpful (0)

    Could you please tell me how much the sound difference would be between the catted downpipe and the off-road downpipe?

    • The Stainless Works Cat-Back Exhaust w/ Y-Pipe - Fastback (15-17 EcoBoost w/ SW Downpipe) is a great system. The off-road down pipe will be much louder and will crack and pop more as you are down shifting then the catted downpipe will.

    Helpful (0)
    Post Your Question
    1 More Question
    i notice this says it comes with the SW ( stainless works im assuming) downpipe but there is an option to add a cat-back or off-road exhaust. the package details dont mention a downpipe either so am i missing something? if it does actually come with a downpipe then what type of downpipe is it? thanks . 1 answer

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    Customer Reviews (2) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 4.5 4.5
    • Exhaust Note 4.5 4.5
    • Fit & Finish 5 5
    • Bang For Your Buck 4.5 4.5

    • 5/5

      Installation Time: Afternoon

      July 19, 2017

      Quality built

      I have the whole turbo back and it sounds good. Will never make that sweet V8 sound but hearing the turbo helps excuse the 4 banger. Louder than I was expecting but you can take it easy and it's fine, really let's you know when your mashing the skinny pedal.


      Year: 2017 Submodel: EcoBoost

      Helpful (10)

    • 5/5

      Installation Time: Afternoon

      April 14, 2016

      Amazing sound for Ecoboost

      The sound of my Ecoboost now is very very nice, it's not too loud to wake my neighbour, but it's definitely loud enough to impress a beautiful chick that I saw on the street. I would for sure recommend this Exhaust for the everyone who owns the Ecoboost. Cheer!!


      Year: 2016 Submodel: Ecoboost

      Helpful (10)

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