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Roush Rear Side Splitters (13-14 All)

Item 69128
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      Review & Installation Video

      Hey, what's going on, guys? Justin with here. As you can see, I've my '14 G.T. back in the shop. I'm doing a little bit more work on it today. You guys seem to be really digging these videos, so I'm going to keep bringing them to you. If you caught the first couple of videos, you can kind of see the general direction of the car. Appearance-wise, I have that GT500 theme going on, thanks to the matte white stripes on the white car - which I think looks really cool - the GT500 spoilers, and some other little parts. Performance-wise, you saw the Cobra Jet Intake Manifold I did in the second video, along with the big monoblade throttle body, the off-road H-pipe, and the MagnaFlow exhaust. So car's running great, looking good so far, but I definitely have some more stuff planned today.I'm starting off with the chin spoiler here, the ROUSH front chin spoiler, which I just finished up installing. Really a big fan of this chin spoiler. Not a whole lot of options available out there for these generation Mustangs in terms of lip spoilers or chin spoilers. The R.T.R. is nice. It's a little too radical for what I'm going for. Boss is really nice, obviously, but price is a little high for me. So the ROUSH is just right. I like it. Simple lip, yet I think it really adds a lot to the car. So I do have some other appearance stuff going on here today, guys. In addition to some stuff inside the car finally. So let's go over to the side, and I'll show you some more appearance stuff.All right, guys. You've been hearing me talk about it for the last few videos and guess what? The nice weather is finally here, so finally been able to throw on my new wheels, and I could not be happier. I went with the '13 and '14 GT500-style wheels wrapped in the very good Mickey Thompson rubber here, and again, the 28's in charcoal. I think they look awesome on the white car, and they really just nail that GT500 look that I've been after ever since I bought this car. So my vision is finally kind of coming together, thanks to these wheels. In addition to that, guys, I also did the ROUSH side and rear splitters to go along with that front chin spoiler from ROUSH. I think the total package just really adds a lot to the car in terms of appearance, and just gives it a much more aggressive look. Now, I am going to get inside the car, of course, but I do have one more suspension part I want to tackle before I do so, so let's check that out.All right, guys. Ryan and I just finished up installing the S.R. Performance lower control arms here on my '14. Now, for a lot of Mustang owners, these are actually one of the top mods you guys do when you first get the car because as you probably know the wheel hop on these things is absolutely horrendous. I've just been dragging my feet a little bit on this mod, but now the car is making real good power, I definitely need these to help me get that power to the ground. Very simple install guide. Basically, a two-bolt install. Of course, you want to make sure you get the brake lines out of the way with a big zip tie, something like that. But again, a very recommended mod with these cars, and again, should help you lay down some nice lines instead of wheel-hopping all over the place. With these buttoned up, I'm going to get inside the car and show you guys a couple mods in there.All right, guys. So here we are in the interior of my '14 G.T. where I am doing a little bit of work today. Now, full disclosure, when I bought this car, it had to have a few options. It had to have the Track Pack, Recaros, and the car had to be white. Now, the only car I could find with those options was a base car. So I am missing out on the cool stereo, some of the nice interior touches, and those Track Apps that we all know and love. So I am trying to fix that one at a time, and I'll show you what I'm talking about. First up, I did the Raxiom Navigation. Now, this is an absolute must for anybody without the factory nav. It integrates so well into the interior of these cars, works flawlessly, and the G.P.S. is right on the money. So hands-down probably one of the best mods I've done to this car so far. As far as that boring base dash, well luckily, here the guys at AmericanMuscle Graphics do offer a few dash overlay kits, so I picked up their carbon fiber version, and I absolutely love this thing, man. Slapped it on one day in the driveway at home just in an hour or two, and it kind of gives you that California Special appearance to your dash if you have a base car like me. It just spices it up a little bit, so I really do enjoy that. Finally, I am missing those Track Apps, so I had to take care of that, and what I did was, I looked at the P.L.X. DM-100 Multi Gauge. Now, this thing has a touchscreen gauge, and it shows you all that great OBD2 info, so air-fuel ratio, intake air temp, water temp, things like that. And it can also be used as a performance gauge, so it can tell you your eighth, quarter mile times, things like that. Definitely a nice thing to grab if you don't have those Track Apps because it kind of takes the place of that, and I had a nice, stealthy install here with the gauge pod. So overall, the interior is coming together pretty nicely. A couple of other bells and whistles I threw in was the Modern Billet 6-speed white shift knob, which I just love that retro look, and I also threw in some Raxiom L.E.D. map lights as well. So overall, again, really happy with the interior. I think the car is really starting to come together. Maybe have a few other things down the road here as far as the interior is concerned, but for now, again, really happy.All right, guys. That's going to do it for this installment on my 2014. Thanks for checking out the progress. I honestly could not be happier with how the car's sitting right now. I think it's looking great, definitely making some good power. Now, it's the time to get on the streets and have a little bit of fun. So drop a comment and let me know what you think of this bad boy, and in the meantime, I'll see you next time. Peace.

      Product Information

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


      • Aggressive Race Inspired Styling
      • Thermo-Formed TPO Material
      • Features a Stippled Grain Texture
      • Easily Installs with Supplied Hardware and 3M Automotive Tape
      • Fits All 2013-2014 Mustang


      Race Inspired. Now you can add even more race inspired styling to your Mustang with a set of Roush Rear Side Valance Splitters. These are the same exact splitters found on the special edition Roush Mustangs, so now you can have the same Roush styling for your ride.

      Roush Quality. Designed with the original OEM CAD data from Ford to ensure a precise fit, these splitters are made from high pressure injection molded thermal plastic olefin (TPO) with a stippled grain texture finish for an aggressive appearance, superior durability and light weight.

      Application. This set of two Roush Rear Side Splitters are designed for use on the newly redesigned 2013-2014 Mustangs including the V6, GT, Boss and Shelby GT500 models.

      Fitment: 2013 2014 Details

      MPN# 421405

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (81)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 81 customers

      Installation Time: Less than 1 Hour

      Installation Cost: 0-$100

      • July 30, 2019

        4 2013 GT - Hal Installation Time: Less than 1 Hour

        2013 GT

        Good product looks good on the car Sturdy product did not take long to receive

        Helpful (0)
      • June 10, 2019

        5 2014 GT - TsCs Installation Time: Less than 1 Hour

        great look.

        Fits Great and didnt take much time at all, scariest part is the drilling into the bumper but it wasnt bad at all.

        Helpful (0)
      • June 07, 2019

        5 2014 GT - WilliamJubeck Installation Time: Afternoon

        Roush side and rear splitters

        Install was very simple, have to drill some holes. Very good instructions. Hardest part was cleaning the tar and junk off of car before install. Looks so good I am going to do the front next.

        Helpful (0)
      • May 25, 2019

        5 2014 GT - WillB Installation Time: Less than 1 Hour

        A must when putting on side splitters

        Ordered the side splitters with this to add on as well. Absolutely added a great look.

        Helpful (0)
      • December 10, 2018

        5 2013 GT - Vic302 Installation Time: Less than 1 Hour

        Perfect for with gt500 rear valance

        Just like the title, no figment issues at all. Looks great!!

        Helpful (1)
      • July 13, 2018

        4 2014 V6 - BrianS Installation Time: Less than 1 Hour

        Easy style upgrade

        Product shipped quick and came with clear instructions and all the necessary 3M prep material to properly install. Having some painters tape to use for the hole drilling template helps. Only a few holes to drill on the unseen plastic portion of the body panel, so no need to be worried. Matches perfect with the Roush front lip and side splitters and rear spoiler. Only 4 stars due to the price for some cool looking plastic accents.

        Helpful (5)
      • May 08, 2018

        5 2014 GT - Mike Installation Time: Less than 1 Hour

        They are as what you expect them to be

        They match the side splitters and go well with the rear splitter. Good quality

        Helpful (5)
      • May 04, 2018

        5 2014 GT - JimW Installation Time: Afternoon

        Gave the car a different,, smooth look

        Gave the car a complete look as I have a front spoiler first. And definitely protect the rocker panels from road debris.

        Helpful (5)
      • May 01, 2018

        5 2012 GT - Danny Installation Time: Less than 1 Hour

        Danny B 5.0

        This is a very easy install, took me 20 minutes. The rear splitters gave my car a more muscular and finished look. This product will fit your 2012 mustang.

        Helpful (6)
      • April 16, 2018

        5 2014 GT - Addison Installation Time: Less than 1 Hour

        Roush Rear Side Splitters

        Great look and easy installation. Make sure the surface is completely clean prior to installation.

        Helpful (5)

      Questions & Answers (10 answers)

      5 Top Rated Questions

      Will the color of these or the side splitters fade in the Sun light?

      • These would start to eventually fade however this would be after many years of sitting in the sun.

      Helpful (2)

      I plan on ordering the MMD rear valence diffuser for my stang and I also think that this might add a decent accent to it, I wouldn't think that there would be any fitment issues but I would like to ask to make sure, will it all fit together back there no problem?

      • The Roush Rear Side Splitters (13-14 All) will fit very nicely with the MMD by FOOSE Rear Valance Diffuser (13-14 GT, V6). You should have no problems with these two items.

      Helpful (1) Show 1 more answer

      Do they have the roush rear side splitters for my 2011 mustang ?

      • I think this splitter was designed for the 2010-2012? The template supplied was a little off, I had to eye it up, to match the body lines

      Helpful (1) Show 1 more answer

      What are the dimensions of this product ? I'm asking because I want to use them on a different car (custom project)

      Will these work on a 2012 roush diffuser?

      • These will not work with the 2012 Roush diffuser as the rear fascia on the 201-2012 models is different than what is found on the 2013-2014 models.

      Helpful (0)
      Post Your Question
      5 More Questions
      Is there any reason that these would not work on a 2012 GT? 1 answer
      I have an 2014 Mustang GT with Gt500 quad tip exhaust, will the Roush rear side splitters work with that? 1 answer
      Can anyone tell me the length of these. Need them for a custom application. 1 answer
      Will these work with the small black splash guards that come stock on the GT500? I am wondering if these work in conjunction with the small black plastic splash guards that seemed to have come stock on my '14 GT500. Or if the splash guards need to be removed. 3 answers
      would these fit a 12 gt? if so is there ne drilling required? 2 answers

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver side Rear Splitter
      • (1) Passenger side Rear Splitter
      • Hardware

      Tech Specs

      Will It Fit My Mustang

      • Boss 302 - 13
      • GT - 13, 14
      • GT500 - 13, 14
      • V6 - 13, 14