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

Market Price $119.99 You Save 17% ($20.00)
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$99.99

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  • Item 394110
  • MPN# 394110

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    Features, Video & Details

    • 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)

    Review & Installation Video

    Review & Install Video

    Hey guys, Stephanie with americanmuscle.com 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 americanmuscle.com.

    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.

    Fitment: 2015 2016 2017 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (2) Left Hand Fins
    • (2) Right Hand Fins
    • (2) Push Pins
    • (2) Alcohol Wipes
    • (2) Adhesion Promoter Packets
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    Questions & Answers (8)

    5 Top Rated Questions

    In the picture, what are the exhaust cutout inserts? I cannot find them anywhere but on this product page.

    • Unfortunately, we do not carry any exhaust cut out inserts for the rear on the 2015-2017 Mustangs. We apologize.

    Helpful (0)

    At what speed do you think these will fly off and if so is it best to use urethane?

    • These diffuser fins should not at all fly off when they are installed properly and the appropriate time for the adhesive to cure is reached. These fins will still be attached even at highway speeds.

    Helpful (0)

    Can this go on a 2014

    • The MMD Rear Diffuser Fins was designed to fit 2015-2017 V6, EcoBoost and GT Mustangs equipped with the factory Base Chassis Packages only and will not be compatible with your 2014.

    Helpful (0)

    Sense you guys offer in house painting can I pay to have these painted??

    • At this time, the MMD Rear Diffuser Fins are not available painted.

    Helpful (0)

    Hi How Long Are The Fins? Thank You

    • From end to end these fins are about 8 1/2" in length and they will stick out about 2 3/4".

    Helpful (0)
    Post Your Question
    3 More Questions
    I've seen customers install these to their premium models and it looks great. Although these were intended for non premium models would they still work for premium? 1 answer
    As far as durability, how are these in a car wash? 1 answer
    Are these an extension onto the small fins already on the car? Also I have a Roush Rear for my current exhaust, will they make for a more aggressive look for Roush body piece? 1 answer

    People Who Bought This Item Also Bought

    Customer Reviews (27) Write a Review

    Overall Rating 4.6

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Fit 4.62963 4.6
    • Appearance 4.777778 4.8
    • Bang For Your Buck 3.814815 3.8



    • 5/5

      Installation Time: Less than 1 Hour

      September 15, 2018

      Well worth it

      Easy install, a inexpensive mod that makes a big visual difference, $99.00 15 minutes changed the rear to a more aggressive look.

      WilliamB

      Year: 2016 Submodel: V6

      Helpful (1)

    • 5/5

      September 12, 2018

      Make sure they are straight

      Well I didn’t get the premium bumper. The next best thing are these fins but they must be straight or else you know. I put these on my car and I think they look awesome. Take your time and have a spotter before you permenantly set em. Good luck

      JordanC

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      July 14, 2018

      Cool Product

      Looks really nice.My GT is Oxford white so they stand out. Better looking than anticipated and so easy to install. Solid too.

      PR

      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      June 23, 2018

      Highly recommend these!!!

      Anyone looking to customize your base Mustang without having to actually modify anything to your car, this is for you. Installation is simple just clean the area good, align, peel and stick. Definitely gives your Stang a touch of aggressive!

      AbrahamM

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      June 02, 2018

      Curb Appeal

      These looks great installed! Kinda hit or miss with alignment and measurement while dealing with curing adhesive promoter and foam tape; so take your time and have patience! Curb appeal is hightened!

      Jacob

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      May 15, 2018

      Transforms the rear of the car

      Easy to install...gives a more aggressive look to the base GT not doubt...would highly recommend!

      Stang12

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      May 09, 2018

      Diffuser fins

      Looks sharp, compliments all the way around. Goes great with a spoiler

      Hector

      Year: 2016 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      May 03, 2018

      Great product

      Great for the basic mustang gt to give it a good back look

      IvanM

      Year: 2017 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Less than 1 Hour

      April 22, 2018

      Nice addition to the rear end

      These diffuser fins install easily with the included tape and plastic pins. I color match painted mine to match my car and they turned out great. I also drilled tiny holes on the inboard fins and used small screws to fasten them to the rear. The outer fins come with plastic pins that hold them on. The inboard fins have just the tape..which should hold fine but as much as these plastic fins cost I can’t see having to buy a whole new set If I lose one. Which brings me to the reason why I docked them a few stars. COST. I can see paying $45 or maybe $50 for these. Sure they look good but they are way overpriced for what you get. I was lucky to get these as a gift, had I not I would still be on the fence about spending so much on them. I’m lucky to have a sweet wife.

      FlyingLow16GT

      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 17, 2018

      Good so far

      Pretty simple installation. They give it a better look than just the base model look. I went ahead and painted the lower back end also so it looks even better with these on.

      DavidP

      Year: 2016 Submodel: EcoBoost

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      March 30, 2018

      Diffuser Fins

      These add a great, aggressive look to the base model rear diffuser. Easy install and pretty good quality. No complaints so far. Stick on through car washes and high speeds. Had them on for a couple months. Still look great!

      ZachD

      Year: 2017 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Less than 1 Hour

      February 06, 2018

      great buy

      it makes your car look a bit more agressive from the rear end , looks really nice and get lots of compliments (:<

      Josefkz

      Year: 2015 Submodel: GT

      Helpful (4)

    • 4/5

      Installation Time: Less than 1 Hour

      January 17, 2018

      cons2015

      look nice,i like and easy to installed, it make my mustang nice

      consn

      Year: 2015 Submodel: V6

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      January 04, 2018

      mustang diffusers

      overall nice addition to the rear, hardest part for me was taking the plastic pins out and peeling the 3m tape off, otherwise make sure you alcohol wipe the area good...tom

      wally67

      Year: 2016 Submodel: V6

      Helpful (4)

    • 2/5

      September 24, 2017

      Moneygrab

      I'd say you get what you pay for, but in this case you don't even get that. 4 pieces of molded plastic that stick on to your bumper, that's all they are. And that's all you get. No template, no screws, no fasteners. Nothing. When installing, you basically have to eyeball everything. There are cryptic pictures and vague instructions on how to align them on your bumper, but that's it. It took me close to an hour, and eventually I had to use a piece of string and masking tape to ensure they were evenly spaced and straight. And even then, one of them still managed to end up crooked. Not recommended.

      Flatus

      Year: 2016 Submodel: V6

      Helpful (6)

    • 4/5

      Installation Time: Less than 1 Hour

      July 22, 2017

      Potentially Overpriced, but Great Nonetheless

      There isn't a better way to create that diffuser look on a non-premium car. I paired this with a local body shop that painted my bumper and finished off the project about $100 cheaper than if I had just bought a new rear diffuser. However, this product on its own is relatively overpriced. They seem very well-made and sturdy from my experience thus far, but for plastic and some 3M tape, some could definitely see this as an expensive mod.

      Dgrench24

      Year: 2015 Submodel: V6

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      June 23, 2017

      Small accent that add sportiness

      I pained mine body colored to blend them in. It's important to line them up exactly so they look factory. . I used a template to get the right and left even. I'm happy with the results.

      ExBoatnut

      Year: 2017 Submodel: GT

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      June 13, 2017

      Fins

      Super easy install, and made the car look great! Really went well with my Magnetic 17'.

      RobertoE

      Year: 2017 Submodel: V6

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      June 11, 2017

      Great Product

      Makes the back end of my car look so much better and mean

      DWill26

      Year: 2016 Submodel: EcoBoost

      Helpful (5)

    • 4/5

      Installation Time: Less than 1 Hour

      June 10, 2017

      Rear Diffuser Fins

      Very simple install. The only part that took me a while was making sure they'd be straight. I used masking tape to mark where I'd put them; when I was finally satisfied that the tape was straight, I stuck the fins next to the tape. They look pretty sharp. I painted mine silver to match my stripes and they seem to hold the paint well.

      Petestang

      Year: 2017 Submodel: EcoBoost

      Helpful (6)

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