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Defenderworx Quarter Window Louvers (15-18 Fastback)

Market Price $229.97 You Save 5% ($11.50)
Starting At

$218.47 (pair)

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  • Item 394120
  • MPN# 901448

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Quoted installation from $125

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    Features & 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 2015-2018 Ford Mustang Fastback Models
    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 2018 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 Details

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

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    2 Questions / 2 Answers

    Ask a Question

    Are these louvers paintable?

    JohnS

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

      AMRobD

    Helpful (0)

    How much visibility do you have from the inside?

    CraigM

    • 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.

      AMJEFF

    Helpful (0)

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    Customer Reviews (9) Write a Review

    Overall Rating 4.4

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Fit 5 5
    • Appearance 5 5
    • Bang For Your Buck 4.777778 4.8



    • 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 (0)

    • 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 (1)

    • 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 (1)

    • 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 (1)

    • 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 (1)

    • 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 (1)

    • 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 (3)

    • 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.

      JamesW

      Year: 2015 Submodel: V6

      Helpful (3)

    • 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 (2)

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