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SpeedForm ABS Quarter Window Louvers - Unpainted (15-19 Fastback)

Market Price $139.95 You Save 14% ($20.00)
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  • Item 390937

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    Features, Video & Details

    • Five Slot Closed Louvers
    • Durable Urethane Construction
    • Matte Black Finish
    • Ships Ready to Paint
    • Sold as a Pair
    • Fits All 2015-2019 Mustang Fastbacks

    Review & Installation Video

    Review & Install Video

    Hey, guys, Adam here with Today, I'm bringing you a quick review of the ABS Quarter Window Louvers in the unpainted finish, available for all 2015 and newer Mustangs. The ABS Quarter Window Louvers are gonna be for the 2015 and newer Mustang owner out there looking to pick up the classic '60s styling for their exterior appearance without breaking the bank on a name-brand option on the market. The Quarter Window Louvers I have here today in the unpainted ABS plastic offer an aggressive appearance that brings a wave of nostalgia reminiscent of the classic '60s era true muscle car appearance. Now, we all know Ford kept in mind this classic appearance when designing S550s, so why not keep that mentality when shopping for aftermarket parts? Now, as you can see with the louvers I have here today, they offer the very basic louver design with the five windows and a closed-off design if you look at it from an angle. Now, some of the other options on the market do leave this open for a more aerodynamic option, allowing air to pass through them. It's gonna be one of my nitpicks about this option here, but then, again, this is a more budget-friendly option, as opposed to some of the name-brand options that do offer the open-style louvers. Now, as far as the materials go, this does not fall short quality-wise. You can expect an OEM-quality material with a high-impact, ultra-durable ABS plastic, and as you can see, like I mentioned before, this is an unpainted finish. This is not offered in a painted finish like some of the name-brand options. This will be completely up to you if you decided to take it to a custom-paint shop to get your factory paint matched. Obviously, you can run it in the unpainted finish for a more sleek, aggressive matte-black look. Now, if you are interested in the budget-friendly option when it comes to the ABS Quarter Window Louvers, expect to be spending about 120 bucks for these, when compared to some of the other name brands that can range anywhere from $200 to $300 with different style designs. Obviously, it comes down to personal preference and how much you'd like to spend. Now, to switch gears over to the installation portion of the video, you can expect a very straightforward, very simple installation that doesn't require any drilling or permanent modification to your S550. This one will completely use the pre-applied 3M tape on the back of the actual louvers already. All you'd have to do is peel these off and apply them to your vehicle, but let's get into more detail here. Before you could peel back the 3M tape, you will need to completely clean the area you'll be applying the louvers to. Alcohol wipes will be provided in your kit. You want to make sure you use those to free it of any dirt and dust to make sure the 3M tape gets a good bonding with the vehicle. Once the area is completely clean, you want to remove the backing on the pre-applied 3M tape on the back of the louvers, stick them into place, pressing firmly all around to make sure they get a good bond with the vehicle. Repeat this process for the opposite side, and overall, you're done. You're looking at about 15 minutes start to finish on the installation. I would definitely give this one a one out of three wrenches on the difficulty meter. So just to quickly wrap things up guys, if you're the owner of a 2015 or newer Mustang and you're looking for a way to capture the classic '60s muscle car era styling without breaking the bank on a top-name brand, you might wanna check out the ABS Quarter Window Louvers I have here today, which, of course, are available right here at

    Retro Fastback Louvers. Now you can emulate the classic quarter window louvers of classic 60's fastbacks with this modern five-slot closed louver design for your 2015-2019 Mustang Fastback. These SpeedForm Louvers add some original muscle styling to the side of your S550 while providing some privacy and additional shade for your interior.

    Quality Urethane Construction. These side louvers are crafted from flexible but durable urethane, providing an exact fit to your S550 while also ensuring they withstand weather and sunlight. They ship unpainted and sport a sleek matte black finish – you can leave them as is for a subdued look, or have them painted by your local body shop.

    Easy Installation. These SpeedForm Louvers are measured and fabricated to exact specifications, ensuring a perfect fit on your S550 Fastback. First, clean your quarter window glass with detergent followed by rubbing alcohol. Wipe dry to ensure your glass is free of contaminants and dust, then simply peel away the 3M tape on your louvers, stick ‘em on, and you're ready to ride. Installation should take less than 30 minutes.

    Application. These SpeedForm ABS Quarter Window Louvers are made to fit any 2015-2019 Mustang Fastback, including V6, EcoBoost, GT and Shelby models. These louvers are sold as a set of two.

    Technical note. AmericanMuscle strongly recommends a professional installation of all body parts, especially if painted. We also recommend test fitting these louvers before they're painted, to ensure no rough spots or edges need to be sanded first.

    Fitment: 2015 2016 2017 2018 2019 Details

    MPN# 390937

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (2) ABS Quarter Window Louvers - Unpainted
    • Pre-applied 3M Adhesive Bonding Tape
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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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 4.555555 4.6
    • Bang For Your Buck 4.444445 4.4

    • 5/5

      Installation Time: Less than 1 Hour

      December 05, 2018


      Good product looks good and easy to install takes 15 minutes


      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      October 26, 2018

      Speedform Louvers

      Love the look of these on my Shadow Black GT. Very simple installation and there is no worry of these coming off. Prep was easy. They are very light weight, so if you’re worried about added weight, don’t be with these. 100 recommend!


      Year: 2018 Submodel: GT

      Helpful (1)

    • 4/5

      Installation Time: Less than 1 Hour

      July 27, 2018

      Pretty Good

      The look of the product on the car is excellent... I do believe they are overpriced though... I can see selling them for about $59 Still they look durable and they somehow transform the car to the old classics


      Year: 2018 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      May 25, 2018

      Great Mod for the price!

      Louvers fit perfectly and were a breeze to put on. I left them the matte black to match the other black accents on my car and absolutely love the aggressive look these provide, couldn't be happier!


      Year: 2015 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      April 14, 2018


      These louvers gave my mustang that dark batmobile look! Loving it !


      Year: 2017 Submodel: V6

      Helpful (3)

    • 4/5

      Installation Time: Less than 1 Hour

      April 12, 2018

      SpeedForm ABS Quarter Window Louvers 

      The product looks great and sexy on my 2016 Shelby Cobra GT350.


      Year: 2016 Submodel: GT350

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      June 16, 2017


      These louvers are great, they add great character to my mustang. I waited a very long time for my order but it was well worth the wait. See attached pic of my yellow ecoboost it gets attention from everyone when I take it out.


      Year: 2015 Submodel: EcoBoost

      Helpful (6)

    • 2/5

      Installation Time: Less than 1 Hour

      April 28, 2017

      Oop ordered wrong ones.

      I lost a side louver on the toll road, ordered these to replace. As soon as I removed them from box I noticed they were lightweight. I kept them anyways instead of returning but they look really cheap compared the the Cervani louvers I had on my Shelby. Wish I could order just the one to replace the one lost, but they only sell in sets.


      Year: 2016 Submodel: GT350

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      November 25, 2016


      The material very resistent, easy to install, exactly the item that i search, improves the appearance of the car.


      Year: 2015 Submodel: GT500

      Helpful (5)

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