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Quarter Window Louvers (15-19 Fastback)

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Market Price $229.97 You Save 5% ($11.50)
Our Price

$218.47 (pair)

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  • Item 394120

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    Features, Video & Details

    • Aggressive Styling
    • Louvered Design
    • Polyurethane Construction
    • Matte Black Finish
    • Simple Peel and Stick Installation
    • Driver and Passenger Side Louvers Included
    • 4-Year Limited Warranty
    • Fits all 2015-2019 Ford Mustang Fastback Models

    Review & Installation Video

    Review & Install Video

    Aggressive Modern Design. Make your Mustang stand out at your next car show with a set of Defenderworx Quarter Window Louvers. These stepped Louvers were designed to give your fastback S550 Mustang a more aggressive muscle car appearance. With these Quarter Window Louvers on your Pony, you are guaranteed to turn heads wherever you go.

    Polyurethane Construction. DefenderWorx manufactures their quarter window louvers from industrial-grade, OEM quality injected molded polyurethane for superior strength and long lasting durability. These Louvers are completed in a matte black finish that allows them to be installed straight out of the box.

    Easy Installation. No fuss, no muss installation. DefenderWorx Quarter Window Louvers are designed to attach to the factory C-Pillar glass with the supplied 3M doubled sided automotive bonding tape for a quick and easy installation. Just clean the surface, peel the backing and stick in place - it's that easy.

    Recommended Styling Upgrade. When installing exterior quarter window louvers or scoops on your Mustang it is recommended to add a set of quarter window blackout decals to hide the ugly back side that wasn't meant to be seen by human eyes. See option above.

    4-Year Warranty. DefenderWorx guarantees to the original purchaser of its products a 4-year, 36,000 mile warranty, against manufacturer defects in materials and workmanship under normal use. Some exclusions may apply, please see manufacturer's warranty for details.

    Application. Defenderworx Quarter Window Louvers are designed to fit all 2015 to 2019 Fastback Mustangs, including the V6, EcoBoost, GT, and Shelby GT350 models. Sold as a set of two, one driver side and one passenger side.

    Fitment: 2015 2016 2017 2018 2019 Details

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) Pair Quarter Window Louvers
    Installation Info
    Tech Specs
    Will it fit my Mustang?

      Customer Photos (19) Submit Your Photo

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        Questions & Answers (3)

        3 Top Rated Questions

        Are there drain holes to handle car washing and rain water?

        • Water will drain naturally, due to the shape/angle of the louvers.

        Helpful (0)

        Are these louvers paintable?

        • The Defenderworx Quarter Window Louvers are able to be painted, however prep, sanding, and primer will be required.

        Helpful (0)

        How much visibility do you have from the inside?

        • This Defenderworx Quarter Window Louvers will still allow some visibility, however, it will only be in the amount of the open space in the louver slots.

        Helpful (0)
        Post Your Question

          Customer Reviews (18) Write a Review

          Overall Rating 4.6

          out of 5 stars

          Installation Time:Less than 1 Hour

          • Fit 5 5
          • Appearance 4.888889 4.9
          • Bang For Your Buck 4.722222 4.7



          • 4/5

            June 03, 2019

            2019 Bullitt

            Overall I was impressed with the look and quality of these louvers. I'd rate them five stars if not for a minor fitment issue on the front bottom edge which might be specific to the Bullitt due to the chrome window reveal molding. (I had to lightly sand about 1/16" off from the bottom front edge back about 2 1/2" to get the louver to lay flat against the glass without binding.) Be aware that these louvers are designed to be painted. I sprayed them with a flexible/sandable primer surfacer followed by acrylic urethane, three coats of base four coats clear, then color sand hand buff. It takes a little time to do it right but it's worth it.

            JohnF

            Year: 2019 Submodel: Bullitt

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            April 04, 2019

            Adds a nice, aggressive look.

            I was looking at multiple different styles of louvres and finally settled on these. I’m glad I did. Material is nice and install is simple. Complete install took about 15-20mins. Couldn’t be happier with the purchase.

            Nicolai614

            Year: 2017 Submodel: EcoBoost

            Helpful (0)

          • 3/5

            Installation Time: Less than 1 Hour

            March 16, 2019

            Defenderworx louvers

            The design is great and I like the idea you can see between the vents. I was not too happy on the out of the box flat finish. They look like they need painting. Sturdy construction, not too flimsy. All in all they look radical on my 5.0. For a price of over $200.00 they could have a least put a nice coat of flat black on them.

            DP

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            January 27, 2019

            Louver

            It fit perfect and looks great love it. It came in like they said in 3 days. That's why I sway use American muscle.

            JeremyL

            Year: 2017 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            January 02, 2019

            Quarter Window Louvres

            I just installed these louvres last night and they fit perfectly! I ordered the matte black and they look great with the matte black trim. Installation was quick and easy. This is the second set of Defenderworx louvres I’ve purchased and it’s a great product.

            LorrayneP

            Year: 2018 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            November 06, 2018

            Love the Louvers

            Good product, well constructed and looks great and I can still see out the side windows. Easy to install as long as you make sure your tape is positioned properly.

            TomL

            Year: 2017 Submodel: EcoBoost

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            July 28, 2018

            Yeah Baby

            The looks say it all. I was able to install the louvers in no time flat, 15 minuets for each side.

            Frank

            Year: 2015 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            July 01, 2018

            Love these Louvers

            Good product, good fit, and overall appearance is awesome at completion of the install.

            WilliamV

            Year: 2017 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            June 26, 2018

            Easy Install and they look fantastic

            These look fantastic the quickest way to make your mustang stand out

            JimmyT

            Year: 2018 Submodel: EcoBoost

            Helpful (3)

          • 3/5

            Installation Time: Less than 1 Hour

            June 13, 2018

            Out of the box

            Bought this item based on the claim that they are ready to install right out of the box, you could but the plastic will easily scratch with even a light fingernail drag across the top. I’m sure it wouldn’t take long for them to be completely scratched from washing, etc... So I had them painted shadow black and cleared, I must admit they look great. Will add an aggressive touch to your Mustang.

            JohnS

            Year: 2016 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            May 28, 2018

            Excellent

            The install was super easy, it took maybe 30 minutes tops. The fit was also perfect!

            MichaelA

            Year: 2018 Submodel: EcoBoost

            Helpful (4)

          • 4/5

            Installation Time: Less than 1 Hour

            May 24, 2018

            Easy install

            Install was easy only thing was instead of running a single line of 3m tape around the louver like it says to in the instructions i had to run 2 lines to securely hold it in place. looks amazing

            EduardoG

            Year: 2015 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            May 15, 2018

            Great look!!

            Good fit, easy to install. Really like the look! Makes the black trim on my CS pop!

            mustangmik1

            Year: 2017 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            April 17, 2018

            Great louvers

            Great lovers, great fit. Love the openings so you can still use the window.

            BrandonD

            Year: 2015 Submodel: EcoBoost

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            March 19, 2018

            Nice louvers

            They look really nice and was very easy to put on.

            JamesH

            Year: 2015 Submodel: EcoBoost

            Helpful (3)

          • 5/5

            Installation Time: Less than 1 Hour

            February 15, 2018

            Quarter window louvers

            Easy install, simple straight forward instructions. Took like an hour. Just follow preperation instructions. Since my car is Competition Orange, I left them unpainted.

            RobertM

            Year: 2016 Submodel: GT

            Helpful (7)

          • 3/5

            Installation Time: Less than 1 Hour

            July 20, 2017

            Defenderworx Quarter Window Louvers

            Feel durable. Easy to install, and makes the exterior look more expressive. A little pricey, but overall i would recommend. 15 minutes to install using double sided tape.

            bob10099

            Year: 2015 Submodel: V6

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            July 19, 2017

            Great look!

            Looks great and was easy to install! Definitely worth it.

            JosephU

            Year: 2017 Submodel: V6

            Helpful (5)

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