COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017

COBB: 591100
CJ's Low Price:
1508457600 44022
After you install your exhaust system, put this COBB Front Mount Intercooler on and fine tune it all with the COBB Accessport to really push your Focus ST over the top!
CJ's Low Price:
CJ's Low Price:
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COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017
COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 Play COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 Video 1 Play COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 Video 2 Play COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 Video 3

Product Description

COBB 3" Stainless Steel Cat-Back Exhaust System with Dual 4" Tips for 2013, 2014, 2015, 2016 and 2017 Focus STs.

COBB's 3" Stainless Steel Dual Tip Cat-Back Exhaust System is a direct replacement system for your 2013-2017 Focus ST. The exhaust features full 304 stainless steel construction, custom inline mufflers and dual 4" double wall stainless steel tips. Installation of this system results in a drone-free and unique exhaust note.

Full stainless steel construction means the COBB cat-back holds up to the elements extremely well with high quality metal. Beautiful TIG welds seal all seams perfectly, resulting in zero exhaust leaks. CNC mandrel bent tubing creates the perfect fit every time for a no-hassle installation. COBB custom inline mufflers produce a sound unique to the COBB cat-back. Minimal restrictions increase exhaust velocity for the best bump in horsepower available. Dual 4" slash cut, double wall tips feature the COBB logo and look fantastic exiting the rear of your 2013-2017 Focus ST.

Please Note: Ford designed the 2015 Focus ST with four exhaust hangers but only added three on the factory exhaust system. All aftermarket exhaust systems are built to use that fourth exhaust hanger. CJ Pony Parts recommends the purchase of COBB’s Polyurethane Exhaust Hanger Kit (591001).

Includes all necessary hardware and installation instructions.

Compliment this cat-back system with a COBB downpipe or upgrade to the full turbo-back exhaust system. Pair the exhaust with a COBB Accessport V3 Tuner for a fantastic bump in horsepower. COBB offers ready-to-run maps to maximize power made from their cat-back exhaust system.

Order a COBB 3" Stainless Steel Cat-Back Exhaust System with Dual 4" Tips for your 2013, 2014, 2015, 2016 or 2017 Focus ST from CJ Pony Parts today!

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Focus Applications

This product will fit the following Focus years:

Product Reviews

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COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 is rated 4.7 out of 5 by 36.
Rated 5 out of 5 by from Great sound, perfect fitment I bought this for my '13 ST3 for a little more "audible character" than it had from the factory. I've installed several other aftermarket catback exhausts from different manufacturers on previous vehicles I've owned, and this was by far the easiest, quickest, best fitting product I have ever used. The exhaust arrived much sooner than I expected - the website said it was a 2-3 week backordered item when I ordered, but it arrived on my doorstep less than a week after I ordered. The welds are beautiful, and the piping runs dead center down the stock exhaust channel. The tips were easy to center. I am definitely happy that I decided to go with Cobb!! I'll be back for a downpipe soon...
Date published: 2015-12-05
Rated 5 out of 5 by from Piece o' Cake for 2015 ST Fits the 2015 ST and is an EZ Install. It takes longer to unpack it, get set up than it does to replace the exhaust. I didn't need any hanger pliers as my car is only a month old. I had to bend some heat shield out of the way (and back) when fitting the pipe over the rear axle. The actual work took less than 20 minutes. My 8-year old son helped my out with fitment and the awesome test drive!
Date published: 2015-05-11
Rated 5 out of 5 by from High quality! Sounds so good! Extremely high quality. Install was very simple on my 2016 ST. Nice deep tone on start up (wouldn't call it loud). Does NOT sound "ricey" at all. It is not obnoxious when driving through the neighborhood (so if you are worried about waking everyone up....fear not). Once you get out of the neighborhood and slam on that right pedal... well yea you are definitely going to hear it! In all seriousness this is a great sounding system. Again, I would not call this "obnoxious loud", but you it gets pretty loud when you want it to (in a good way). Very very little drone. On the highway, unless I am really accelerating hard, it's pretty quiet. In my opinion, this is one of the best sounding systems for this platform!
Date published: 2016-07-05
Rated 5 out of 5 by from Great quality, addicting sound! This exhaust system is by far the best quality system I have found for the Focus ST. Flange connections make sure the joints don't leak, full stainless steel, and a simple installation. When they say drone free, they really mean it! And when your on the throttle, your treated to an awesome low end tone! The sound is truly addicting, and very pleasing to your ears. I'd recommend this system to any ST owner, I truly believe its second to none. Well done Cobb, WELL done!
Date published: 2014-06-11
Rated 5 out of 5 by from Just right... The build quality of this exhaust is exemplary - beautiful TIG welds and fits perfectly. Almost too pretty to put under the car! Also appreciate the use of flanges instead of slip joints so that it won't get twisted out of shape later. The sound is perfect for me - loud enough when on boost and quiet otherwise. I drove it at 60, 70 and 80 mph and the "drone" on cruise was imperceptible - not sure what others were complaining about. If you tip into the throttle to accelerate then you can definitely hear the exhaust but it goes away as soon as your speed stabilizes. If this is too much "drone" then you should consider staying with the stock exhaust -it's very quiet.
Date published: 2017-08-14
Rated 4 out of 5 by from Makes car more special. I've had this cat back installed for about two weeks now and I have no complaints about its performance. It doesn't drone when cruising, it's deep and loud enough when you want it to be, but it won't annoy your neighbors when you're just driving around town. Great sound! Also, super high build quality. Zero fitment issues.
Date published: 2014-08-18
Rated 3 out of 5 by from Very nice quality - way too much drone I installed this on a 2015 ST. I have about 500 miles on it since the install. This piece has outstanding build quality. The fitment (I used the ultra pricey Cobb poly hangers) was perfect. The installation was a piece of cake. However, there is A LOT of drone from 2500 to 3500 rpm, under load. I have a stock down pipe and stock tune. I'm not sure if a catless dp will improve or exacerbate the droning problem. Running up through the gears is not terrible, but highway cruising speed in 6th gear is right in the drone range. It is LOUD in the cabin in that range. If you crack a window or the sun roof, the drone improves somewhat, but then you have to contend with the wind noise. Overall I am content with the product, but I am not as happy as I had hoped to be, based on other reviews. This is a 5 star product to look at, and to install - no question. When you factor in the excessive drone, and the price, I had to give it just 3 stars. All the reviews I have read stated that this unit has minimal drone compared to the other products on the market. If that is the case, the other brands must be head-splittingly loud. For paying close to $900.00 all said and done in a cat back exhaust, I could stand to be a little happier.
Date published: 2016-03-21
Rated 4 out of 5 by from Quality product! CJ Pony Parts did a great job getting the exhaust to me. No delays etc. The exhaust it's self is very well built. Quality product. Was delivered in excellent condition. No dents, dings etc. The exhaust was very easy to install. All pieces fit together perfectly. The only difficult part was get the one section over the axle. I am very happy with the sound of this exhaust, low deep and smooth. Cobb builds very good products.
Date published: 2016-04-16
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Product Questions

How, if at all, does this exhaust effect the vehicles warranty?

Asked by: Soaringpeacock
No it does not.
Answered by: Rick CJs
Date published: 2017-07-03

Hello, can I use this exhaust in Germany? Are there all papers for a German registration here? What is the price in euro, if I would buy this part this week? Have you any pictures es an example how it looks on a car? Thank you in advance.

Asked by: FocusSTturnier
It does not include European paper work. We will get an installed photo added.
Answered by: Rick CJs
Date published: 2016-01-28
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Product Video

COBB Cat-Back Exhaust System Stainless Steel 3" Focus ST 2013-2017 Video Transcript
By Bill Tumas: One of the first modifications many EcoBoost owners make is an aftermarket exhaust system. The factory exhaust leaves a lot to be desired. Adding an aftermarket exhaust is going to free up some weight usually, also free up some horsepower, and give you a much better sound.

In the case of the 2015 Focus ST, and don't expect the others to be any different, is the factory exhaust just has no character whatsoever. It's quiet and it's definitely not a performance exhaust fitting of the Focus ST. Thankfully, all the 2013 through 2014 exhausts are going to fit the 2015, so today we're going to upgrade our 2015's exhaust system using this Cat-Back from COBB.

This COBB Cat-Back is almost too beautiful to install on the car. It's made of 304 3 inch stainless steel, featuring CNC mandrel bends and beautiful tig welds on all of the pieces. It has 2 copper proprietary mufflers, and a set of 4 inch double wall stainless steel tips. Everything needed for installation is included by COBB.

While Ford did make some upgrades and changes to the 2015 Focus ST, the exhaust unfortunately wasn't one of them. It has the same bland sound as the 2013 through 2014. (engine revs) Nothing about that exhaust tone screams performance, but thankfully that's an easy fix. Let's get started with our COBB install.

With the exception of using 3 hangers instead of 4, the exhaust on the 2015 ST is exactly the same as the 2013-2014. That means the first step in removing the factory exhaust is going to be to cut it. What we're going to do is cut, you see right where this curve is, right behind the weld, so you can remove the two pieces separately.

We're going to remove the rear muffler now from the stock hangers. Carefully fish it over the axle. Here's a close up shot of the difference with the 2015. As you can see, the actual stud is there, but there is no hanger from the factory where this middle pipe would go. We do suggest if you are buying an after market system for your 2015 Focus ST, pick up a set of COBB's polyurethane exhaust hangers at the same time. That will give you a 4 piece set, which are much better than the factory hangers. It gives you everything you need to properly install the system. You can install it with 3 hangers, but it's more likely the system is going to move around and can create problems.

With the pipe cut and the rear muffler moved, now we're going to move up front and disconnect the Cat-Back from our factory down pipe by removing the two nuts on the other side of the pipe right here. The rest of the exhaust is still held in place by a hanger, so now you can remove this brace here. That will allow us to get the rest of the system off.

It's kind of hard to get the hanger removal tool in here, so a small pry bar will help you get this one off.

With the system off, we're now going to remove all of the factory hangers, so that we can replace them with our COBB polyurethane hangers. Spray a little lubricant on the stud and slide on the new hangers. The front-most hanger is a little different than the others. To install this one, I'm just going to push the hanger straight up and twist it into place.

Now we can begin the installation of the actual Cat-Back by installing two of the supplied bolts through our down pipe, and then choose the correct supplied gasket from COBB. If you have a stock down pipe you want the 2 1/2 inch gasket. If you have an aftermarket, COBB, or any other 3 inch pipe, you use the 3 inch gasket.

We're going to put the mid pipe into place by putting it on to the rear hanger. Install the retaining nuts on the front. We'll just get them hand tight for now. With that in place, we are going to reinstall the brace. It just give a little more support so the exhaust doesn't fall.

The next part's probably the trickiest part, and that is getting the pipe over the axle. It is difficult to get it to line up and get it into the insulator. It can be done, just take your time and get it over there. The part with the weld here is the back, so this is the part that goes over. I know it's a lot easier to take the hanger off and put it on the pipe first to get the rear one on.

We're ready to connect the front pipe to over the axle pipe. Install hardware and a gasket. We'll get that hand tight as well and move on to the tip.

Start by putting it into the hanger on the passenger side. Get an idea of where it's going to go and then grab the hardware. Now we'll go back through and tighten everything down.

Now let's fire it up with our COBB exhaust. The COBB's a nice step up over the stock exhaust. It has a much deeper tone. It's not loud, it's not buzzy, it's not raspy. It just has a nice tone to it.

The COBB exhaust would be a really good choice for somebody who wants a performance exhaust, wants the 3 inch flow, wants the added horse power, but doesn't necessarily want a really loud system. I'm driving the car, you can hear it. It's got a deeper tone than the factory. It's got a nice tone to it, it's just not overly loud. There we are, about 3,000 RPM, then we'll get up to highway speeds. Right now we're around 2,000 where most mufflers are going to have a drone to it. Really almost no drone at all. You can barely hear it. If you put it under a load, you get a little bit of a sound out of it, but overall you barely even notice it.

If I had to say, sound wise it's probable kind of similar to the MBRP sound, just not as much. The MBRP had a nice deep tone, but it was on the louder side. This has the same kind of deep tone to it, just not overly loud.

This system is going to be perfect when paired up with COBB's down pipe, because the down pipe always adds a little more volume to the system. In the couple installs we've done by added a down pipe, it actually got almost too loud. I think in the case of this, it’s going to give it a perfect tone. I love the sound of it, it's just not a very loud system. I want to call it more of an adult sound, but it's not that pricey, high pitched, turbo sound a lot of the systems make. This has a nice, clean, deep tone to it.

A wide open throttle doesn't change pitch either. It doesn't get raspy. It doesn't get tinny at all. It just keeps the same tone throughout the RPM band.