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

AmericanMuscle no longer carries the Roush Quad Tip Passive Axle-Back Exhaust (15-17 EcoBoost Premium). Please check out 2015-2019 Mustang Axle-Back Exhaust for an updated selection.

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: Details

CA Residents: WARNING: Cancer and Reproductive Harm -

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?

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      Questions & Answers (14)

      5 Top Rated Questions

      Can this one fit with Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe ? . thank you

      • The Roush Quad Tip Passive Axle-Back Exhaust will be compatible with the Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe.

      Helpful (1)

      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.

      Helpful (1)

      The fitment says it would fit a 2018 EcoBoost premium on your page is this correct? And if so where could I find a valence to fit the 2018 mustang to add quad tips.

      • This would not be compatible with the 2018 premium models at this time

      Helpful (0)

      Which down pipe goes best with this exhaust? P.S I have the resonator deleted

      Will this fit a 2018 EcoBoost?

      • No, the Roush Quad Tip Passive Axle-Back Exhaust will not be compatible with a 2018 Ecoboosts Premiums at this time.

      Helpful (0)
      Post Your Question
      9 More Questions
      From what I understand the EcoBoost and V6 mustang share all common dimensions in exhaust and body panels. My question is why wouldn't this fit a V6? 1 answer
      For a 2016 Ecoboost Premium Convertible, does this require any of the additional frame bracing to be taken off and left off? I saw a video that showed installation of a similar axle-back (maybe the same one?) that required that the additional frame bracing would "have to go away". I'm hoping this is not the case with this system as I noticed there is an option for both normal and convertible. I'm hoping the convertible version basically routes around the bracing properly without removing it. Thanks for your answers. 1 answer
      Guys, is there anything special I need to know about the installation on a convertible? Specifically 2016 Ecoboost Premium Convertible. 1 answer
      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 1 answer
      will this work on the standard 2017 ecoboost mustang? 1 answer
      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? 1 answer
      Is this a full 3" exhaust 1 answer
      What is the difference in the EcoBoost vs the GT version Quad exhaust? 1 answer
      Will this fit a 2015-2017 EcoBoost Mustangs without the Premium Chassis Package? 1 answer

        Customer Reviews (1) Write a Review

        Overall Rating 5

        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 (18)

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