Roush Rear Side Splitter Kit 2013-2014

Roush: 421405
MSRP: $99.99
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Roush Rear Side Splitter Kit 2013-2014
Roush Rear Side Splitter Kit 2013-2014 Roush Rear Side Splitter Kit 2013-2014 Roush Rear Side Splitter Kit 2013-2014 Play Roush Rear Side Splitter Kit 2013-2014 Video 1

Product Description

Roush Rear Side Splitter Kit for all 2013-2014 Mustangs.

Add true race-inspired styling to your 2013-2014 Ford Mustang with ROUSH's Rear Side Splitter kit, a perfect match to ROUSH's Side Skirt/Rocker Splitter Kit (GER11). Each rear side splitter fits underneath the rear valance to create an aggressive styling line with the road.

The 2013-2014 Mustang Rear Side Splitter kit is made from high-strength TPO (thermal plastic olefin) for long lasting durability. The plastic is molded with high-pressure injection, the same process used by the automotive manufactures. These splitters come unpainted and feature a black grained textured finish to increase longevity against rock impacts while driving.

Designed with OEM CAD data to ensure precise fitment. Installation takes only minutes, and there is no trimming needed. The kit includes a driver side and passenger side rear side splitter, hardware kit, installation manual and template.

Similar Mustang Parts

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Installation Instructions

Mustang Installation

Mustang Applications

This product will fit the following Ford Mustang years:

Product Reviews

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Roush Rear Side Splitter Kit 2013-2014 is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from Roush rear splitter a must if you got the side Clean perfect a must have with the roush side splitters
Date published: 2015-03-05
Rated 5 out of 5 by from Nice So easy to install that only takes about 5 minutes. It's pretty cool with side skirts
Date published: 2015-02-08
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Product Questions


Are you considering making a version to fit 05-09 mustang?

Asked by: tmac72
That would be something you would need to ask the manufacturer. If they offer it, typically we sell it.
Answered by: CJ Pony Parts
Date published: 2015-08-06

will this fit a 2011 v6 mustang or do you guys have the proper ones for my pony

Asked by: Deputy374
This one won't fit and, unfortunately, there aren't any rear side splitters available for 2011s.
Answered by: CJ Pony Parts
Date published: 2015-03-12

I have an `09 GT with the CDC front chin spoiler with splitter upgrade plus their new rocker panel splitters. Now I'm looking to finish it off with splitters for the rear quarters. Is anyone considering making them for the 05-09 models?

Asked by: tgmac72
Not that we're aware of, unfortunately.
Answered by: CJ Pony Parts
Date published: 2015-03-02
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Product Video

Roush Rear Side Splitter Kit 2013-2014 Video Transcript
By Bill Tumas: Today we're going to install this Roush Rocker Splitter Kit, as well as their Rear Splitter Kit on our 2013 Gotta Have It Street car. The splitter kits are designed to match the front spoiler we already installed on the car and carry the theme down the side of the car just like the 427R and other special edition Roush Mustangs.

The rocker splitters are going to mount to your factory rocker moldings using these extensions and the Roush supplied push pins, as well as five additional holes we'll have to drill and tape to make sure your splitters don't go anywhere. The rear splitter is going to mount underneath the ends of your back bumper. They do require drilling for installation. Roush provides a template, as well as hardware and double stick tape to hold them on.

For this installation you'll need a jack and jack stands or lift, needle nose pliers, 1/4-inch ratchet, 7 mm socket, scissors, tape, drill, 1/8-inch pilot bit, 1/4-inch drill bit, rubbing alcohol, and safety glasses. Once you have your car off the ground your first step is going to be to remove the factory push pins holding on your factory rocker panel. You're not going to use them with the new pieces. The rocker will stay in place by the screws on the ends.

Now we're going to prepare our new rocker splitter for installation. The first thing you want to do is bend all these tape tabs over toward the edge. That way once you have it in place and held in place by the push pins you can slide that off and stick it to your rocker. Roush provides new push pins for installation. You don't want to push them in all the way yet. Leave about an eighth of an inch gap so you can remove the tape once it's in place.

When you line up the tabs, we're going to start with the one in the center and then move onto the two ends to hold it in place. Remember don't put them all the way in, leave a little bit of a gap. Now we're going to remove our tape. You want to make sure you slide the splitter as far back as you can on the studs before you pull the tape off. Now that we have it adhered to our rocker we're going to make all our push pins tight. It might be easier to use a screwdriver so you can get up there and put good force on the center.

Once you've installed all your pushpins in the factory locations, the Roush splitters have five additional holes that have to be drilled for additional support. We're going to put some tape about an inch down in your drill bit to use as a stop when you drill. Once you finish drilling your holes you can install your last five push pins.

Now that we're finished with our rocker splitter kit we're going to move on to the rear splitters. The rear splitters don't use any factory hardware, but require holes to be drilled in the bottom of our bumper cover. Roush supplies a template to tell you where to drill your holes.

You want to tape your template in place. It folds in front to follow the inside body line right here lining up with the factory hole in the back here. Once you have it in place, you can drill pilot holes in the center of each bulls-eye. Once you drill those, you can remove your template.

You want to save your template to use on the other side. Now we're going to open our holes up to the proper quarter inch diameter. Now we're going to install the supplied J-clip fasteners. Make sure the threaded stud is pointing up and slide her over the hole.

Now we're going to prep the splitter for installation. It comes with 3M tape. We're going to take the white backing off to prepare them to go onto the panel. Before we put them we're going to apply the supplied adhesion promoter. Just put it on the edge from the holes back. You don't want to put it all over the entire panel. Put the 3M tape on between the holes. In this case we are going to remove the tape first, then our panel is ready to install.

Now we're going to install the bolts to hold it in place. You don't want to tighten them all up yet, just enough to keep it hanging in place before you push up on the tape. Once you have them in place you push up on the panel, stick it into place with the adhesive, and then tighten down the bolts, and our installation is finished.

Now that we have our car back on the ground you can see how well our new rocker and rear spitter work with our previously installed Roush front splitter. It gives our lowered Mustang an even more aggressive look. The rocker splitters should take you no more than about an hour to install and figure about the same amount of time to do the rear splitters. You'll be back on the road in no time.