Roush Cold Air Intake Kit Focus ST 2013-2015

Roush: 421609
MSRP: $299.99
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Roush Cold Air Intake Kit Focus ST 2013-2015
Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Roush Cold Air Intake Kit Focus ST 2013-2015 Play Roush Cold Air Intake Kit Focus ST 2013-2015 Video 1

Product Description

Roush Cold Air Intake Kit for all 2013, 2014 and 2015 Focus STs.

Add some horsepower to your Focus with the addition of a Roush cold air intake. Along with increased horsepower is enhanced sound from the blow-off valve. No drilling or cutting is required. This simple bolt-on intake maintains the factory PCV connection and utilizes factory PCM calibration.

Features 3" aircraft-grade aluminum induction tube with black texture finish for maximum air flow. A high flow air filter element is re-usable and washable. Premium silicone couplers have reinforced, weaved fibers for superior sealability. The system is topped off with a custom Roush stamped air box with air-tight hood foam seal.

- Premium high flow air filter with clamp
- One silicone coupler
- One aluminum induction tube
- Two mounting clamps
- Airbox tray with EPDM foam hood seal
- Instruction manual

*Not approved for use in California or states that require a California EO#.

Order a Roush Cold Air Intake Kit for your 2013, 2014 or 2015 Focus ST from CJ Pony Parts today!

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Installation Instructions

Mustang Installation

Focus Applications

This product will fit the following Ford Focus years:

Product Reviews

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Roush Cold Air Intake Kit Focus ST 2013-2015 is rated 4.9286 out of 5 by 14.
Rated 5 out of 5 by from Awesome Intake After bouncing around on many different intakes, I finally decided on this one. Most of the intakes I researched all used the same Green Filter (which is fantastic), so it came down to price and features. I'll admit, I chose the Roush because the open air box is aesthetically pleasing, and the price is superb! The parts are all very high quality, and installation was a breeze (with the proper tools). The suction and blowoff sounds are phenominal thanks to the filter. You also get a nice gurgling when you let off the throttle without engaging the turbo. Finally, you can definitely feel an excellent increase in throttle response. Overall, great product and I would recommend it to any ST friends.
Date published: 2015-01-29
Rated 5 out of 5 by from Looks great I have had this on for about a month. Gas mileage has not changed but the performance and sound has. The car seams to respond quicker. And it looks really cool.
Date published: 2015-02-09
Rated 5 out of 5 by from looks and sounds awsome Easy to install and looks the best under the hood ! No better name brand under a ford hood then roush.
Date published: 2015-03-24
Rated 5 out of 5 by from Awesome product! Bought earlier this month. Installation was decent had two hiccups. Difficult to get the coupling on the air inlet tube (nothing a little grease couldnt help with) and the attachment point closest to the airbox seemed to be distorted slightly (Didnt light up great and was slightly tilted). Nothing major though. It sounds good, looks good, feels good.
Date published: 2015-03-18
Rated 5 out of 5 by from 2015 ST Very easy to install CJ video is a lot better to follow than the dark images used in the manual. Turbo spool sound is awesome. No problems with 2015 installed under an hour with proper experience with cars. Not much in the hp gains only throttle response maybe 5
Date published: 2015-08-05
Rated 5 out of 5 by from Intake is great Very pleased with the roush intake, sounds awesome and works well. Also isn't too flashy, which I like
Date published: 2015-07-02
Rated 5 out of 5 by from Roush COI for Focus ST I've had this on now for a couple of weeks. Minimal performance gains, but I like that I can hear my turbo now. I'm using this as a starting point for future upgrades. Installation was pretty easy. It took me just over one hour and I could probably do it again in under 45 minutes.
Date published: 2015-06-16
Rated 5 out of 5 by from Great sound Bought it a few weeks ago. Shipped and delivered problem free. Install took some patience but not hard at all. This intake adds some great sound to the engine, you can actually hear the turbo whistle and blow off.
Date published: 2015-05-23
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Product Questions


Does it come with the roush sticker?

Asked by: burd114
It should.
Answered by: CJ Pony Parts
Date published:

Can I use this kit but still keep my green filter or do you have to use the filter that comes with the kit? Newbie here ;-)

Asked by: mich29
You'll need to use the filter that comes with the kit. The OEM filter isn't cross compatible.
Answered by: CJ Pony Parts
Date published: 2015-08-31

Great product I love the sound and the excellent throttle response. I noticed that my filter is getting dirty, as to be expected, how do I clean the filter? 

Asked by: nyr9791
There are kits available at local auto parts stores that you can use for that job.
Answered by: CJ Pony Parts
Date published: 2015-05-24

Will this intake go well with the Borla Cat back i have on my 2014 Focus ST?

Asked by: Thepunisher
Yes, you should be in great shape with that combo.
Answered by: CJ Pony Parts
Date published: 3000-05-22

how much horsepower will this add?

Asked by: whiplash883
It gives a modest horsepower increase.
Answered by: CJ Pony Parts
Date published: 2015-08-24

I saw your response about the Roush vs. Cobb for CAI in a 2015 Focus ST. When I contacted Roush they said they don't have one for 2015 models currently. Do they have to wait for approval from Ford or something? They say theirs doesn't void warranties. 

Asked by: Irvin57
This one fits all 2015 STs, and has been verified for that fitment. Perhaps the Roush rep you spoke to was unaware of that point. It doesn't void the warranty on your ST.
Answered by: CJ Pony Parts
Date published: 2015-05-29

I need some clarification. I asked a few days ago if the Cobb CAI was compatible with the 2015, I was told it wasn't and that Cobb was modifying to fit the 2015. If this one fits 2015, why doesn't Cobb's fit. Is this item a verified fit?

Asked by: ST337
It really depends upon the design of the intake as to whether it would fit in the 2015 ST. This one is from Roush, and their design adapts to the 2015 ST without issue. The COBB version, for whatever reason, did not, so they need to create a new version for the 2015 ST. This Roush intake is verified to fit the 2015 ST.
Answered by: CJ Pony Parts
Date published: 2015-06-30
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Product Video

Roush Cold Air Intake Kit Focus ST 2013-2015 Video Transcript
By Bill Tumas: The Focus ST makes great power stock, but like any true hot ride, we're always looking for ways to make some horsepower. Whether your car is naturally aspirated, super charged or turbo charged like our Focus, a good cold air kit is one of the easiest ways to add horsepower. Today, we're going to install this Roush Performance cold air kit on our 2013 Focus ST.

The Roush kit comes with everything necessary to install on your Focus including this inlet tube which comes in black. We actually powder-coated ours white to match our car. Comes with the silicone couplers, hose clamps, seal, a new box and a reusable filter. For this installation, you need a quarter inch ratchet, 7 mm socket, 8mm socket, 12mm deep socket, extension, flat head screwdriver, flashlight and scissors.

Our Roush cold air kit is going to replace our air box lid with a high flow lid, we'll replace this tube here as well while still keeping the stock mass air meter. The first step is to remove our engine cover. Simply pull straight up and put it aside. The air box lid is held in place by these four bolts here, so we'll remove our stock paper filter, and we're going to remove the factory clamp for the rubber boot here and the other one on the side.

I'll separate it from the cam cover and remove. Now we can remove these two mounting bolts here from the cam cover to get the rest inlet tube off. This is your normal 8mm, but for this we're going to need a deep socket and you want to make sure you keep this, because this is actually one of the mounting points for your factory engine cover and you will reuse it.

I'm going to disconnect the PCV from the back of the tube. Simply squeeze them together and push backward. The last plan for removing the stock air tube is kind of hard to see but it's down behind the cam cover, it's the same size as the other one. Simply remove it and pull the whole tube off.

You want to remove the steel inserts from the factory air tube, you're going to use two of them in your new Roush. Simply push up on the metal insert, pull the insert out and then remove the washer. Now, we'll install the inserts we just removed on to our Roush inlet tube. Now, we'll install the coupler onto the tube here, and install the supplied clamp.

Now, we'll connect our cold air kit to the factory lower tube on the turbo, this will be the hardest part of the installation, since it's so far down the engine bay. You'll notice we actually put some towels on top of our engine to protect our powder kit, we do the same thing with the stock paint as well.

I'm going to tighten the clamp up by hand just to get it to hold before going there and tighten it down for good. We'll reach behind and connect our PCV to the inlet, pull our towels out, now connect to our meter, now tighten down the factory clamp. You want to install the Roush supply washer underneath this and then reinstall the factory bolt.

We'll reinstall the factory mounting stub for our cover. We'll reinstall the bolt to the throttle body, we'll then install our new filter. Now, we'll install the factory screws from our factory lid into our new Roush open lid and tighten everything down. Now, install the seal which snaps into place. Now, cut off the excess. Our last step is to reinstall our engine cover and our installation is finished.

A Roush cold air kit is definitely a lot less restrictive, so it should pick up some horsepower without any additional tuning necessary. Installation should only take you around an hour and you'll be back on the road in no time.