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MMD Rear Diffuser Fins (15-17 Mustang Non-Premium)

Item 394110
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      Video Review & Installation

      Hey guys, Stephanie with here with a review and install of the MMD Rear Diffuser Fins for the non-premium, 2015 and newer, GT EcoBoost and V6 Mustangs. In this video we're gonna go over a few different topics when it comes to these diffuser fins. We're gonna talk about the styling, the materials and construction, and the install as well. We'll talk more about the install later, but I can tell you right now that the install for these is easy. It's a one out of three wrenches on the difficulty meter.The MMD Rear Diffuser Fins are gonna be something that you should check out if you're looking for some rear bumper accessories that are going to the change the appearance of the rear of the non-premium S550s, without having to purchase an entirely new rear diffuser. Now there really aren't many options when it comes to the non-premium cars, and if you don't really like the look of the MMD one-piece diffuser these give you another option with a different look. These rear diffuser fins are simply added to your rear diffuser to give it an after-market aggressive appearance. These give you a way to change the looks of the rear end of your car in a very simple, very easy, and also reversible way. That's the beauty of these, in my opinion. They're so simple, yet they do make a difference in looks and you don't have to spend an arm and a leg, or go with an after-market rear diffuser.These have a smooth, matte black finish, so they'll match any paint color right out of the box, and you don't need to change anything or do anything to make them look good on your car. You get two fins for each side of the rear diffuser and, as far as materials, these are made from ABS plastic, which is commonly used for exterior styling because it's lightweight, strong, and durable. Those are all good qualities for an item that's gonna be living on the rear of your car.These are gonna come with everything you need to get them installed. Like I said, a big plus here is that they're very easy to install. They install just with 3M tape that's already on the backside of the extensions, so you don't even have to worry about placing them. They're also gonna come with alcohol wipes and adhesion promoter, so you can make sure you get a good bond and a few pushpins to guide and make sure these stay in place. One thing I did want to mention though is that these are designed to fit the S550 base models. They won't fit the premium cars.When it comes to price you can expect to pay just over the $100 mark for these. Now this is less expensive than the full rear diffuser option, and you still get the change in looks while spending minimal dollars. As far as the install, if you wanna even call it an install, it's very easy. It's a one out of three wrenches on the difficulty meter and you can expect to spend 15 minutes to get these installed. You won't need any tools, but you are gonna want to make sure that you have a clean surface and that you test fit these before installing. Once you have the diffuser clean, use the alcohol pads to prep the diffuser where the 3M will be. Then use the adhesion promoter after you peel the backing off the 3M tape, and allow it to dry. Then it's just a matter of firmly pressing the diffuser fins onto the diffuser after you line up the pushpins using even pressure. I'd just keep in mind allowing these to set on the car before you wash it or take the car in the rain.Wrapping things up here with the MMD Rear Diffuser Fins. These offer a fast and easy way to change the appearance of the rear end of the non-premium S550 Mustangs without having to purchase an entirely new rear diffuser. These give you another option when it comes to exterior styling with a non-premium rear bumper and you can check them out more online right here at

      Product Information

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


      • Aggressive Race Inspired Styling
      • Smooth Matte Black Finish
      • Durable, Injection Molded ABS Construction
      • Simple Peel and Stick Installation
      • Fits 2015-2017 GT, EcoBoost and V6 Mustangs
      • Designed for Base (Non-Premium) Chassis Packages Only (Trim Levels: 050A/051A/100A/300A)


      Aggressive Race Inspired Styling. Do you own a base model 2015-2017 Mustang with the Non-Premium Rear Bumper? Would you like to give it a more aggressive race inspired appearance? If you answered yes to both of these questions you should check out a set of Modern Muscle Design's Rear Diffuser Fins. These MMD Rear Diffuser Fins are a simple and inexpensive way to alter the exterior appearance of your base model Mustang.

      High Quality Construction. Manufactured from an OEM quality injection molded acrylonitrile butadiene styrene (ABS), these MMD Rear Diffuser Fins were designed using the original OEM CAD data from Ford to ensure a perfect fit. ABS is an extremely strong material known for its light-weight, superior durability and impact resistance - making it perfect to withstand the hazards of daily driven vehicles.

      Simple Peel and Stick Installation. No messy glue or drilling is required for installation. These MMD Rear Diffuser Fins are designed to install simply with the pre-applied 3M doubled sided automotive bonding tape. Thoroughly clean the surface and then simply peel the 3M tape from the back of the Fins and set them firmly in place using the included push pins as a guide. It is that easy.

      Application. These Modern Muscle Design Rear Diffuser Fins are designed to fit 2015-2017 V6, EcoBoost and GT Mustangs equipped with the factory Base (Non-Premium) Chassis Packages only (Trim Levels: 050A/051A/100A/300A). Not intended for use on Premium Package models.

      Please Read. If you are having trouble determining what style bumper your Mustang is equipped with please refer to the comparison image above.

      Modern Muscle Design



      MMD 394110

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Left Hand Fins
      • (2) Right Hand Fins
      • (2) Push Pins
      • (2) Alcohol Wipes
      • (2) Adhesion Promoter Packets

      Tech Specs


      Customer Reviews (51)

        Questions & Answers

        10 More Questions

        Will It Fit My Mustang

        • EcoBoost - 15, 16, 17
        • GT - 15, 16, 17
        • V6 - 15, 16, 17

        Fits Base (Non-Premium) Chassis Packages Only (Trim Levels: 050A/051A/100A/300A)

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