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MMD Radiator Extension Covers (15-17 GT, EcoBoost, V6)

Item 398225
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Market Price $149.99 You Save 13% ($20.00)
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$129.99 (kit)

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      Review & Installation Video

      What's going on, guys? Adam here with We're taking a quick look at and installing the MMD Radiator Extension Covers fitting all '15 to '17 GT, EcoBoost, and V6 Mustangs. You should be taking a look at the extension covers if you're looking to cover up that side frame right behind your radiator shroud and behind your headlights to really blend in with the engine bay a little bit more. That is a pretty good weak spot that I think should've been covered up from the factory. This is a completely OEM-looking part that just blends in absolutely perfectly.It's gonna make the engine bay look a lot better on my buddy Will's 2016 GT with that Vortech supercharger. Coming in with some of that carbon fiber accents, this thing is gonna look so good with this installed. It covers up some of the hood latch wiring on the driver's side, no wiring whatsoever on the passenger's side, and it is an extremely simple install. As you can see from the back here, there's one strip of 3M automotive bonding tape. The other two are going to be simple push pin clips. One of those push pin clips already exists under the hood as one of the radiator shroud clips. We're just gonna pop that off, pop it right back in over top of our extension covers. There are two more push pin clip provided for you by MMD to make your life a little bit easier as well as some adhesion promoter and alcohol wipes to get the job done. Overall, you are looking at absolutely no longer than about5 minutes, maybe 10 at the absolute most, if you really wanna go to town and cleaning some of that frame but it's not necessary.I'm gonna show you guys how this gets done but I want to let you know, if you want to pick this set up, you can do so for just a little less than 140 bucks for your own S550. And in my opinion, like I said, look, this is something that should have come on the car from the factory so 140 bucks to really blend in some of that under hood dress up is going to go a long way especially for car show guys. Without further ado, guys, I want to show you how this gets installed, so let's go ahead and get our panel removal tool. All right guys, now before we can actually get this installed, I'm gonna set that aside for just one second. I'm gonna grab my panel removal tool and if you don't have one of these, a flathead screwdriver works just as well. We're gonna pop off this one clip here on our radiator shroud. Now, as you can see, when this does it in place, that's its positioning right there. So that clip here is gonna go. We're gonna pull that clip right out of this radiator shroud and pop it right back in over top of that hole.So let's set this aside and grab our tool here and we're gonna pop this off. Now again, a flathead screwdriver works just as well. This just makes life a little bit easier. We're going to set that aside for one second. Now, at this point, you have a couple of different options. You can set this right into place, put that push pin clip back over top, and use the one provided by MMD to pop it into place. Now that is option number one. Option number two is to take your alcohol wipes, clean off the area up here where the numbers are stamped into the metal, peel off the 3M tape on the back here, and really stick it into place. Now that's not an absolutely permanent installation, but that will make it a little bit more difficult if you wanna pop off your factory shroud to work on, say, your upper grille, your lower grille, maybe your front fascia is coming off. That way, you would have to heat gun that adhesion promoter off. Now, we are going to do that option to show you guys the full install here, so what we're gonna to do before we actually get this installed we're going to set that aside, grab our alcohol wipes.Now, as you can see, if you follow this frame a little bit farther back toward your strut tower, you'll see a bunch of numbers stamped right into your sidewall here. That's about the area that that 3M tape is gonna go, so grab that alcohol wipe there and just clean off the area, making sure that you're cleaning up all of the dust, whatever might be here from debris, clean off that area, so your 3M tape gets a really good bonding. All right, once you have that all cleaned up...All right, at this point, we're gonna take our adhesion promoter given to us in the kit here and just put a little bit of promoter right around that number. It'll give us a really, really good bond.Now that we have that in place, we can lay our extension cover down, line those up with our holes, and give that a firm push up by the 3M. From here, make our way back down to our factory radiator shroud. We're gonna use that push pin here that was given to us by MMD to snap it into place. Now we're gonna take our push pin click that we removed, pop it into our secondary one up here. All right. Now we can repeat this for the opposite side. Over here on the driver's side, the only difference in the install is going to be this cable here. We're gonna pop off these two clips holding it to the frame. Those come straight back.Now those are not going to be pushed into any new spot. We're gonna leave that loose. All right, with that cable loose, all we have to do is follow the exact same steps as we did on the other side. So I got my panel tool here, we're gonna pop off the clip on our factory shroud, use our alcohol wipes to clean our area, adhesion promoter, take off the red tape on the 3M, and stick it into place. Now, if you wanna pick up the MMD radiator extension covers for your own '15 to '17 GT, EcoBoost, or V6 Mustang, you can do so for about 140 bucks for the pair right here at

      Product Information

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


      • Sleek Custom Under Hood Appearance
      • ABS Plastic Construction
      • Textured Matte Black Finish
      • Simple Installation
      • Fits 2015-2017 V6, EcoBoost and GT Mustangs


      Custom Show Car Styling. Give your S550 Mustang a sleek custom under hood appearance with a set of MMD Radiator Extension Covers. These Radiator Extension Covers are a great and simple way to hide the unfinished appearance of your Mustang's engine bay.

      High Quality Construction. Manufactured from high quality acrylonitrile butadiene styrene (ABS), these MMD Radiator Extension Covers were designed using the original OEM CAD data from Ford to ensure a perfect fit. ABS is an extremely strong material that is known for its durability and heat resistance - making it ideal for use under the hood of you Mustang.

      Simple Installation. MMD's Radiator Extension Covers are designed to attach with the supplied push pins and 3M doubled sided automotive bonding tape for a quick and easy installation. No drilling or permanent modifications are required.

      Application. These MMD Radiator Extension Covers are designed to be a perfect fit on 2015-2017 V6, EcoBoost and GT Mustang models. Sold as a set of two, one driver side and one passenger side.

      Modern Muscle Design

      Fitment: 2015 2016 2017 Details

      MPN# 398225

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 100+ customers

      • April 01, 2020

        3 2016 GT - Charper


        Had to drill a new hole on the passenger side towards the front of the car due to the hole in the part not lining up with hole on the car.

        Helpful (0)
      • March 20, 2020

        5 2015 GT - ScottM

        Awesome fit!

        MMD makes great parts, install was a few minutes!!! They look great!

        Helpful (0)
      • February 11, 2020

        1 2017 GT - Kent


        The product looks great until you find that it doesn't fit properly and rubs against the hood in over SIX PLACES. I didn't realize this until the covers rubbed the paint off the hood and left spots on the covers where they touched the hood. I looked in the reviews (SHAME ON ME, I should have done this first) and found that many customers had the same problem. There doesn't seem to be a way to check if the product fits after you install it and it damages the paint. Over 10 of the reviews (including 5 Star, 4 Star, 3 Star, 2 Star and 1 Star) mentioned this issue. I would think the manufacturer (MMD) would address this. AM's only solution is refund or replacement. Contacting the manufacturer is not an option as AM seems to keep them isolated. AM or MMD doesn't appear to want to help with problems on their products. I am concerned to purchase other MMD products or products from AM for their lack of concern about a product(SHAME ON THEM).

        Helpful (13)
      • February 06, 2020

        5 2015 GT - WarrenS

        Rafiator covers

        Easy install and gives the engine a cleaner look. Something ford should install from factory

        Helpful (0)
      • February 02, 2020

        5 2016 GT - CharlesH

        OEM fit and quality

        These look and fit like they came on the car. I painted mine for a further enhanced appearance. Yery happy with these covers.

        Helpful (0)
      • January 31, 2020

        5 2016 EcoBoost - Americanmuscle

        Radiator extension covers

        Radiator extension covers Give my engine compartment a whole new view really makes my stank look great with the hood up too

        Helpful (0)
      • January 26, 2020

        5 2017 GT - ELD

        Too easy

        Very easy install, really cleans up the front under hood lines. Should have been standard from the factory. Clears factory hood but may require some slight trimming with aftermarket hoods.

        Helpful (1)
      • December 23, 2019

        4 2015 GT - Timbo

        Great Product Overall

        Great product, but the 3M tape on the panels don't stick very well, so you will need to get some more tape to keep the panels secured.

        Helpful (0)
      • December 18, 2019

        5 2016 GT - DavidL

        Extension covers

        I really like the look great quality and will not hesitate to buy and again.

        Helpful (0)
      • November 11, 2019

        5 2015 GT - Indygt


        Absolutely a easy install!! They look fantastic!! If you want a clean factory look these are what you need. So clean up the appearance under your hood.

        Helpful (0)

      Questions & Answers (35 answers)

      5 Top Rated Questions

      Will this fit 2015 GT mustang with an airaid box installed?

      • The MMD Radiator Extension Covers will have no issues working with the Airaid Cold Air Intake.

      Helpful (8)

      Will these MMD Radiator Extension Covers work on a 2018 Mustang GT?

      • The MMD Radiator Extension Covers have not yet been tested on 2018 models. Fitment will be updated once testing has been completed.

      Helpful (4)

      Why doesn’t this product available in Australia

      • Due to restrictions set by our third party shipping partner I-Parcel, some items are unavailable for international shipment.

      Helpful (3)

      When is MMD planning on making a version that will fit the 2018/2019 models?

      • At this time, we do not currently have an update on if this part will be available for the 2018/2019 Mustang models.

      Helpful (1)

      Ok so I ordered these and looking to use them only for car shows with hood open I'm looking at getting these covers painted American flag theme to make car look so awesome I'm afraid that these will have to much gap if not put in all the way but looking to use these only for putting on during shows then taking them off for daily driving. What can I do or use to make this work by just placing them in place but not installing them fully in do they kinda fit in place or is it really bad placement without using the 3m tape ?

      10 More Questions
      Will this fit a 2016 Mustang with a Ford Performance Cold Air intake? 0 answer
      Mine are now cracking on the driver side and look funky. Is anyone else having the same problem? 0 answer
      Is it possible to purchase new push pins for these covers and new Velcro after a few em removal is for in grill work the push pins and Velcro are no longer good? Thanks 1 answer
      Hi guys!! I need your help. Please, can you give me the measurements of the box and weight to calculate international shipping costs. Thanks!! 1 answer
      Will this fit a 2015 V6 Mustang with an Roush Cold Intake (P/N 421828) installed? 1 answer
      Does this set up high and cause paint damage under the hood? 1 answer
      Repeat question but any word on whether these will be developed for the 2018 GT? 1 answer
      Will these fit along with the radiator cover you sell for 2017? The Ford Performance cover? 1 answer
      Does the manufacturer ever plan to release a 2018 version? 1 answer
      Will this work with the C L CAI? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Left Extension
      • (1) Right Extension
      • (2) Large Push Clips
      • (2) Small Push Clips
      • (2) Alcohol Wipes
      • (2) Adhesion Promoter Packets

      Will It Fit My Mustang

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