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Roush Quad Tip Passive Axle-Back Exhaust (15-17 EcoBoost Premium)

Market Price $1,034.99 You Save 4% ($40.00)
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  • Item 388836
  • MPN# 421922

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Fastback Convertible
Ship to: ASHBURN - 20146
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    Features & Details

    • ROUSH Passive Axle-back Exhaust System
    • Aggressive, Raspy Exhaust Note
    • Unique Open-Chambered Muffler Design
    • 304 Stainless Steel Construction
    • Full Mandrel-Bent Tubing
    • 4" Stainless Steel Quad Tips w/ Chrome Flashing
    • Cut & Clamp Installation
    • Fits 2015-2017 Premium Package EcoBoost Mustangs Equipped w/ Roush Rear Valance
    Aggressive Raspy Sound. Let everyone know your EcoBoost Mustang has arrived with the aggressive, raspy sound of this high performance Quad Tip Roush Axle-Back. This innovative new Roush Exhaust system features a hollow, open chamber muffler that results in increased air flow and a unique sound, with no in-cabin "boom" normally found with performance exhaust at cruising speeds.

    Quality Roush Construction. Constructed from fully mandrel bent 304 stainless steel for a durability, corrosion resistance and long life, the Roush Axle-Back Exhaust features two unique open chambered mufflers with 304 stainless steel dual wall quad tips. The 4" quad tips are finished with a new chrome flashing process that is resistant to discoloration due to exhaust heat.

    Passive System. Featuring block off plates for the two inner exhaust tips, this Roush Quad Tip Passive Axle-Back gives you the ability to cruise with just the two outer tips open or all four tips. Simply remove the inner plates to further improve the sound and performance of this Quad Tip Exhaust.

    Active Ready Kit. This passive exhaust system is also designed as an "Active Ready" Kit, which will allow you the option to easily remove the included block off plates and simply bolt-on Roush's Active Exhaust Module (sold separately).

    Cut & Clamp Installation. The installation of this Axle-Back Exhaust requires cutting, removing the factory muffler assemblies and clamping the new muffler assemblies in place. Clamps, hardware and installation instructions are provided.

    Application. This Roush Quad Tip Passive Axle-Back Exhaust System is designed to fit fastback or convertible 2015-2017 EcoBoost Mustangs equipped with the factory Premium Chassis Package (Trim Levels: 200A/201A) and will require the use of the Roush Rear Valance 421894 or 421919 for proper installation (valance sold separately).

    Fitment: 2015 2016 2017 2018 Details

    What's in the Box
    • (2) Axle-Back Assemblies
    • (2) Quad Tips
    • (4) Clamps
    • Installation Hardware
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 304 Stainless Steel Tip Material : 304 Stainless Steel with Chrome Flashing
    Piping Size: 2.5" Tip Size: 4"
    Muffler Type: Open Chambered Fitment: 2015-2017 EcoBoost
    Will it fit my Mustang?
    • EcoBoost - 15, 16, 17, 18

    Compatible with Mustangs equipped with the 15-17 Roush Rear Valance only

    Customer Photos

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    7 Questions / 6 Answers

    Ask a Question

    Will this help increase my cars horsepower(by how much)?


    • While the Roush Quad Tip Passive Axle-Back Exhaust will help to increase performance, the gains will be minimal with any axleback.

      Rob D

    Helpful (0)

    I have a ecoboost premium package. I am looking for more style and keep the sound as stock as possible. Do you have any parts you would recommend


    • The Roush Quad Tip Passive Axle-Back Exhaust will be a fairly aggressive exhaust. For a closer to stock sound we would recommend the Pypes Street Pro Touring Axle-Back Exhaust as this will be one of the quietest ecoboost exhausts on the market.

      Rob D

    Helpful (0)

    will this work on the standard 2017 ecoboost mustang?


    • Hello! This will not fit the standard 2017 ecoboost mustang without the Premium Mustang rear valence.

      Doug P

    Helpful (0)

    How similar to a 5.0 does it sound? I noticed on some exhaust systems you guys would rate its loudness with a little diagram. Where would this one rank on loudness?


    • Ranking EcoBoost exhaust and GT exhaust can be tricky at times as the engines play a big role in the sound that is emitted. As far as design, this exhaust is going to be middle of the road when it comes to how loud it sounds.


    Helpful (0)

    Is this a full 3" exhaust


    • This exhaust has a 2.5" piping size and a 4" tip. Unfortunately it is not a full 3" exhaust.


    Helpful (0)

    What is the difference in the EcoBoost vs the GT version Quad exhaust?


    • The two axle-back exhausts are very similar to each other. Though, one is designed to fit the Ecoboost and the other is designed to fit the GT. You should go with the one that is meant for your specific car.


    Helpful (0)

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    Customer Reviews (1) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Loudness / Volume 4 4
    • Exhaust Note 5 5
    • Fit & Finish 5 5
    • Bang For Your Buck 5 5

    • 5/5

      Installation Time: Less than 1 Hour

      December 20, 2015

      Great exhaust

      If you want a quad exhaust that sounds good and is worth every penny. Then get this one


      Submodel: Ecoboost

      Helpful (1)

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