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MMD Rear Diffuser Fins (15-17 GT, EcoBoost, V6 w/Non-Premium Rear Bumper)

Market Price $134.99 You Save 11% ($15.00)
Our Price

$119.99

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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

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.

Fitment: 2015 2016 2017 Details

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
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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Most Helpful Reviews

5/5
Diffuser in stall

My mustang is oxford white so I painted them oxford white before I installed them. Installation went well. I then sealed the edges with a white kitchen adhesive caulk it made the edges of 3m tape disappear ...

Read More
Helpful (1)

5/5
Finally!!!!!

Finally we are starting to get some rear bumper accessories for non premium pack S550's. I like these much better than the solid one piece MMD rear diffuser. I like how these change the appearance of the ...

Read More
Helpful (1)

Overall Rating 4.7 out of 5 stars
Read All 12 Reviews

Customer Photos (13) Submit Your Photo

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3 Questions / 3 Answers

Ask a Question

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?

ArmanV

  • Hello! This rear diffuser is made to fit correctly only on non-premium rear bumpers. Although people have modified these to work on premium models, they are not intended for anything other than non-premium bumpers

    Doug P

Helpful (0)

As far as durability, how are these in a car wash?

DomLoading

  • These will be able to withstand car washes without compromising the fins.

    KevinD92

Helpful (0)

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?

NLaw

  • These are not extensions onto the small fins already located on the Roush rear valance. These are additional diffuser fins that are added to your rear valance.

    KevinD92

Helpful (0)

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Customer Reviews (12) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Less than 1 Hour

  • Fit 4.583333 4.6
  • Appearance 4.833333 4.8
  • Bang For Your Buck 3.916667 3.9



  • 4/5

    Installation Time: Less than 1 Hour

    April 13, 2017

    Diffuser fins on my EB

    Looks good, easy install and feels solid but about $40 overpriced. Takes only about 15-20 min install. I used some masking tape to dry-fit the 4 fins. Once in the right position, I used a dry erase marker to mark it (wipes away no problem).

    PaulN

    Year: 2015 Submodel: EcoBoost

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 05, 2017

    Diffuser in stall

    My mustang is oxford white so I painted them oxford white before I installed them. Installation went well. I then sealed the edges with a white kitchen adhesive caulk it made the edges of 3m tape disappear .

    Runaway

    Year: 2015 Submodel: V6

    Helpful (1)

  • 4/5

    Installation Time: Less than 1 Hour

    January 07, 2017

    Im not sure

    I installed them myself, but didnt get any instructions for the fins but they gave me instructions for a battery cover so i dont know what that was about. Had to keep maneuvering them so im not sure how long they will last on there. They look good but i have a feeling when i go to the car wash its gonna blast my fins straight off. They look giod but i think they wont be on for long with the car wash

    Johnny

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 05, 2016

    Finally!!!!!

    Finally we are starting to get some rear bumper accessories for non premium pack S550's. I like these much better than the solid one piece MMD rear diffuser. I like how these change the appearance of the back. Definitely make you stand out from the pack.

    RubyRedGT

    Year: 2016 Submodel: GT

    Helpful (1)

  • 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 (0)

  • 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 (0)

  • 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 (0)

  • 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 (0)

  • 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 (0)

  • 5/5

    Installation Time: Less than 1 Hour

    June 08, 2017

    Look great

    Easy to install, did it in 1/2 hour, my mustang is black so the fins looked like they came with the car. Overall great product

    OwenJ

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 02, 2017

    Love them black on yellow

    My 17 has a yellow skirt there. I didn't want black. I bought triple yellow like it so I added these to my 1 factory strengthener. It looks great

    KennethS

    Year: 2017 Submodel: EcoBoost

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    January 25, 2017

    Exactly what was needed!

    Wanted the more aggressive look of the diffuser fins and these did the job. Install was easy and shipping was fast. Price could be lower considering they are just plastic but I am still satisfied with the results.

    KRGT

    Year: 2016 Submodel: GT

    Helpful (0)

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