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Roush Rear Valance (15-17 GT Premium, EcoBoost Premium)

Item 387054
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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Formidable Roush R7 Styling
      • Durable OEM-Quality TPO Material
      • OEM Style Stippled Grain Texture
      • Not Prepped for Backup Sensors - No Pre-drilled Holes
      • Simple Installation
      • Made in the USA
      • Designed for Use with Roush Quad Tipped Exhaust Systems
      • Fits 2015-2017 GT and EcoBoost Mustangs
      • Designed for Premium Chassis Packages Only (Trim Levels: 200A/201A/400A/401A)


      Formidable Roush Styling. Now you can add a formidable new appearance to your S550 Mustang with a Roush Performance R7 Lower Rear Valance. Designed using the original manufacturer CAD data for a perfect fit, this is the same exact rear valance found on the new special edition Roush Mustangs.

      Quality Construction. Made in the USA at Roush's own plastics manufacturing facility from OEM quality high pressure injection molded high-strength thermal plastic olefin (TPO) for it's long lasting durability, this rear valance features a stippled grained texture for an OEM look and to increase longevity against rock impacts from daily driving.

      Not Prepped for Backup Sensors. This Roush Performance Rear Valance is specifically designed for Mustangs that do not have factory installed back-up sensors. If your Mustang is equipped with back-up sensors please use Roush part# 421919.

      Required Upgrade. For proper installation of this Rear Valance you will be required to upgrade to a Roush Quad tipped exhaust system. GT models will need Roush Part# 421920 or 421921, EcoBoost models will need Roush Part# 421922 or 421923.

      Application. This Roush Performance Rear Valance is specifically designed to fit 2015-2017 GT and EcoBoost Mustangs equipped with the factory Premium Chassis Packages only (Trim Levels: 200A/201A/400A/401A).

      Fitment: 2015 2016 2017

      MPN# 421894

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (30)

      Write a Review

      Ratings Summary

      4.4 out of 5 overall rating from 30 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • December 10, 2019

        3 2015 GT - JasonFL Installation Time: Full Day

        2015 Mustang GT Performance Pack

        To be honest, the appearance is decent. I'm very disappointed in the overall fitment. There are areas where the points do not connect tightly, so a gap is shown on two parts of the rear valance. However, it still looks better than stock.

        Helpful (0)
      • July 14, 2019

        5 2015 GT - Lanter Installation Time: Afternoon

        Rear Valance

        Looks really good. Made the rear of the car look nice. It’s not for the faint of heart. Got some cutting to do and fabricating to do.

        Helpful (0)
      • June 04, 2019

        5 2015 GT - SZIMM Installation Time: Afternoon

        Roush rear valance for quad tips

        I love love love the look the Roush Valance gives the 15 GT. Its amazing how it changes the look of the vehicle.

        Helpful (0)
      • January 28, 2019

        2 2015 GT - JasonM Installation Time: Full Day

        If you can find another option.

        The directions are horrible. Very vague, you have to figure lots of stuff out on your own. The template you have to cut out is also horrible. The studs you put on the sides are too big, if you put them in the 1" it says you ruin the center piece of the valance. Poor pictures as well. It can be done but dont expect anywhere near their 2 hour time frame.

        Helpful (2)
      • December 25, 2018

        3 2016 GT - RussellC Installation Time: Full Day

        Fitment issues with Double Sided TAPE!

        No printed or written instructions came with the valence. Had to log on to website and try to follow pictures and some vague instructions. Being pretty mechanically inclined, installation was sort of self explanatory, BUT, when I see double sided tape used to help hold things together, I get worried. After 13 screws and 2 bolts, plus some tape, the valence does not fit real snug to the bumper. It is very close in some places, and has a very noticeable gap in others. Not the kind of quality I expected...

        Helpful (2)
      • November 27, 2018

        2 2017 GT - Omar Installation Time: Afternoon

        Would not fit right

        The only problem we had is that it did not fit right we cut where we need to and drill where we need it too. It left a gaps on the bottom of the bumpers

        Helpful (4)
      • September 27, 2018

        5 2017 GT - CodyC Installation Time: Afternoon

        Turned out nice

        I installed this on my base performance pack. Alot of cutting but it was worth it. Not for faint of heart

        Helpful (5)
      • September 13, 2018

        5 2015 GT - RobertI Installation Time: Afternoon


        My local body shop was able to install this Roush on a Non Premium GT. I NOW HAVE QUAD TIP EXHAUST.

        Helpful (7)
      • September 07, 2018

        5 2015 GT - RexH Installation Time: Afternoon

        Perfect fit

        For anyone looking to step up your pipe game to that quad tip look, this is a perfect fit. Especially if you don't to pay 700 plus bucks for the Gt350 style valance.

        Helpful (4)
      • June 14, 2018

        3 2016 GT - jacknifetoaswan Installation Time: Full Day

        It looks good, but the install is awful.

        When I received this, I was pumped - it looks great out of the box, the instructions seem good, and I wanted it installed. Well, getting to the point of no return (where you cut your bumper) is fine, but after that, the instructions are garbage. They tell you to put the studs in the wrong boss, and when you try to install it onto the bumper, you can't, because there are standoffs behind the reflectors that hit the bumper. Then, you wrestle it, and the bosses break. Then, there's nothing to stop you from pushing the studs through the plastic and making marks on the outside. I contacted Roush, and they sent me a new center section, and promised to update their documentation and procedures with the correct information, but I have no idea if they did. It looks nice on the car, no doubting that, though because of install issues, it's tough to completely snug it against the bumper cover, so you do get a slight gap in certain places. Install definitely takes a full day, and it's better if you have an extra set of hands.

        Helpful (6)

      Questions & Answers (21 answers)

      5 Top Rated Questions

      Will this fit my 2017 v6 ?

      • Hello, this rear valance will not fit your 2017 V6 Mustang. This part is meant for Ecoboost and GT Premium models with the Premium bumper.

      Helpful (2)

      I have a prem. Gt with awe track will the awe quad fit the roush valance?

      • Yes, that quad exhaust will indeed be compatible with this valance.

      Helpful (0)

      If I put this roush rear valance on my 2017 premium bumper can I continue using the duo tips I have until I can purchase the quad tip?

      • We highly recommend a quad tip exhaust with this valance. However, you should still be able to use the dual exhaust. There will just be a noticeable gap.

      Helpful (0)

      what is the difference between a performance pack and a base model bumper

      • The chassis on the performance pack models will be different from the base model which will affect overall fitment of some parts.

      Helpful (0)

      I was “gifted” a 2019 GT Quad tip exhaust from resonator to quad tip mufflers. I want to put it on my 2017 GT premium to have quad tip exhaust. Will the stock 2019 quad tip mufflers align with the Roush quad tip valance?

      10 More Questions
      Will this work with the mp concept rear bumper that comes with a gt350 valance? 1 answer
      What’s the biggest size quad tips that I could run with this valence ? 1 answer
      I have a 2016 premium package with the Brembos, dash gauges, bigger wheels and tires. The ad states the two piece “premium pkg” bumper will only work. My question is that since I technically have a premium package but I have a one piece bumper will it work? 1 answer
      i have a 2018 ecoboost base package, if i get the roush rear valance and quad tip exhaust, will it fit? 1 answer
      I have a base model 2016 GT will this fit ?? 1 answer
      would this Roush rear valance fit on a 2017 Mustang GT California Special? 1 answer
      Hello! I put a premium bumper with sensors on my base gt, but the sensors are not used. Would I still need to buy the valence with pre drillled sensor holes or could i get the one without holes? 1 answer
      Will this rear valance fit a 2017 gt350? 1 answer
      Will this rear valance fit a shelby gt350? 1 answer
      I have a 2017 ecoboost that is NOT premium. From what I gather this will not fit my mustang, but is there a version for just the regular ecoboost? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Lower Rear Valance

      Tech Specs

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