Flowmaster Cat-Back Exhaust System American Thunder 2-1/4" with Polished Oval Tips Stainless Steel Focus ST 2013-2018

Flowmaster Cat-Back Exhaust System American Thunder 2-1/4" with Polished Oval Tips Stainless Steel Focus ST 2013-2018 is rated 4.7 out of 5 by 17.
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  • Tuned, Resonator-Style Muffler
  • 409 Ss Construction
  • 2-1/4" Mandrel-Bent Tubing
  • 3-1/4" Polished Exhaust Tips
MSRP $738.95
You save 10%

Flowmaster American Thunder 2-1/4" Stainless Steel Cat-Back Exhaust System with Polished Oval Tips for 2013, 2014, 2015, 2016, 2017 and 2018 Focus ST.

The Flowmaster American Thunder cat-back exhaust system is designed to deliver extra horsepower and volume to the roar of your 2013-2018 Ford Focus ST. This sleek, modern, and high-quality system is perfect for anyone who wants to show that their Ford Focus ST is no joke it’s a high-performance, smooth, and powerful driving machine.

As the name implies, a cat-back exhaust system is back from the catalytic converter, and using different cat-back systems can give you different results for your Focus ST. Specifically, Flowmaster developed this cat-back exhaust to maximize the performance of the Focus’s 2.0-liter turbocharged engine, even if you haven’t modified the engine itself yet. That makes it a great way to start working on the overall performance of your favorite ride.

This Flowmaster American Thunder cat-back system includes everything you need to install a brand-new exhaust. It even comes with durable and attractive metal tips that have been polished to a mirror sheen, making the whole system look great. Plus, its durable interior and exterior are sure to stand up to regular, everyday use, even if you drive your Focus ST all over the place.

You can install this Flowmaster cat-back exhaust system using basic tools and a garage lift. Conveniently, Flowmaster built this exhaust system to fit OEM parts so you don’t have to worry about buying new brackets or hangers. It also comes with additional brackets so you can be sure your new system is securely in place after it’s installed.

Flowmaster's cat-back system features 2-1/4" mandrel bent stainless steel tubing. A tuned resonator style muffler delivers a moderate to aggressive exhaust sound. All parts are welded together and built to last. Dual polished oval 3-1/4"x3-3/4" tips exit the center of the rear bumper. Flowmaster's cat-back is dyno tuned for maximum performance. Get the most power out of your 2.0L turbocharged engine with Flowmaster's exhaust system. When you get a Flowmaster system, you’ll notice a couple qualities and benefits to your Focus ST right off the bat.

Features and Benefits:
- High-quality, stainless steel, corrosion-resistant tubing.
- Tuned, resonator-style muffler for a better sound.
- Sleek, strong, and rolled tips.
- General performance improvement.

The American Thunder cat-back is perfect for the person looking for moderate to aggressive sound levels with all of the performance benefits that you would expect from Flowmaster. Flowmaster's cat-back bolts in place of your original exhaust. Just like all Flowmaster products, this exhaust system features high quality components and construction for long lasting life. Made in the USA!

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).

This Flowmaster cat-back exhaust system is the durable, powerful, and long-lasting upgrade you need to get superior performance out of your Focus ST. While the Focus may not be the first car people think of when they think of “power,” that doesn’t mean you can’t turn yours into a high-powered driving machine that can keep up with the best! Whether you want a smooth ride down the highway or break-neck speeds on the racetrack, this exhaust system is a critical part to take your Focus ST to the next level of performance.

So what are you waiting for? Upgrade the look, feel and overall performance of your 2013, 2014, 2015, 2016, 2017 or 2018 Focus ST with Flowmaster's American Thunder 2-1/4" Stainless Steel Cat-Back Exhaust System with Polished Oval Tips from CJ Pony Parts today! And check out our installation video for free instructions on how to rig up your new exhaust!

Installation Videos

Vehicle Fitment

This product will fit the following Focus years:

Rated 5 out of 5 by from Love it I'm very happy with this exhaust,sounds amazing. There's some drone what is fine by me,the drone is not to bad,it's nothing like you cant hear the person beside you. I took my wife for a drive after installation was done and we were talking and I even ask her if the drone was to much and she even said no not at all so it passes the test.lol Sounds amazing inside and outside the car so I'm a very happy customer.
Date published: 2016-02-05
Rated 5 out of 5 by from Sounds amazing!!! Easy installation looks great sounds amazing very impressed.
Date published: 2015-01-09
Rated 5 out of 5 by from FlowMaster Cat-Back Exhaust- 2015 Focus ST I installed the FlowMaster about 6 weeks ago and all I can say is wow! The sound is awesome and the price was very competitive. The pops and crackles sound super good. I've gotten so many compliments on how good the FlowMaster sounds on my ST. You will not be disappointed with this Cat-Back exhaust.
Date published: 2016-03-13
Rated 5 out of 5 by from Sound is perfect for me Great sound. Especially with the cpe cold air intake. Nice gurgle when downshifting and not obnoxious at all in the cab. Love it.
Date published: 2016-10-19
Rated 4 out of 5 by from Exhaust I like the tone and sound just wish it was a little louder
Date published: 2015-07-14
Rated 3 out of 5 by from It's okay Pros: It sounds amazing all through the rpm range, from low to hight and even at idle. When down shifting it has nice growl. The tips are a lot better looking then the stock exit set up. Cons: Terrible drone in 6th gear, not all is Flowmaster fault due to ford's lack oh a high way gear in the ST. My biggest regret is i daily my ST and the catback has already started rusting badly, for me driving my car for only 2 years this is pretty unacceptable. The tips are not rusting due to being a better grade stainless steel.
Date published: 2016-11-08
Rated 3 out of 5 by from Clamps and tip hardware are junk This was the worst experience I've ever had installing an exhaust system. I have installed more than a few systems on my old GMC truck and 1990 Civic, two of them from Flowmaster. Fitment of pipes and joints were spot on. Quality of pipes and muffler are also very good. However the strap clamps for the pipe joints and the clamp bolts provided for the tips, NOT GOOD. 1. Two of the clamps, one off the first to second transition and the one from the second to third transition would not tighten enough to prevent the pipes from twisting at the joints. This is critical to leveling the system and preventing it from sagging into the cross brace under it's own weight. Broke the bolt studs on both of them trying to get them to stop twisting. Yes, the rest of the system was loose. Ended up with standard clamps to do the job, I just plan on replacing them if they rust out before I get rid of the car. Just hit me, maybe if you remove the stops in between the clamp you can get the tension you need to null the slippage? 2. The 6mm bolts provided for clamping the tips stripped the threads before they were even snug on the pipe. One trip to hardware store. Thought 1/4"-20 stainless would do the trick, nope snapped both of those, again before the tips were even snug. Second trip, this time went all in and got grade 8 1/4"-20 and finally was able to get them snugged down to where they weren't flopping all over the place. On the plus side, the sound is superb! Full throttle gets you the grins and minimal drone at highway cruising speed, you forget you even have it.
Date published: 2016-05-13
Rated 5 out of 5 by from Great sounding exhaust I'm very pleased with this set-up. It was extremely easy to install. The sound is very good. Not too raspy. I will say that over time it has definitely gotten louder, which isn't a problem for me. The only knock I can come up with is that the hardware is really low quality. I work in a shop, so this wasn't a huge deal for me but it's worth mentioning.
Date published: 2018-05-08
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Will this exhaust be okay for Chicago’s weather 

Asked by: El Blanco diablo
Answered by: rk cjpp
Date published: 2018-09-06

Hi I'm looking to buy an exhaust for my 2016 focus st, I'm looking for a nice aggressive sounding exhaust. Four instance hearing the turbo and also gurgle popping Sounds, do you thing this is my best option or do you recommend a different exhaust?

Asked by: FocusST123
We have several great options, most of which all have video clips for you to form your own opinion. But this is a great system with a great tone.
Answered by: CJPP Dave
Date published: 2017-10-15

Will a 3 inch downpipe fit this exhaust

Asked by: Henry99
Yes, as long as the downpipe utilizes the factory connection point.
Answered by: CJPP Dave
Date published: 2017-06-12

I purchased the sound symposer delete a bit ago and was waiting until i got an exhaust to go with it. I am looking at the Flowmaster and am curious how the car sounds in the cabin with the symposer delete and the catback exhaust. Have you guys tried that?

Asked by: CDL492
Yes, you will not be disappointed.
Answered by: CJPP Dave
Date published: 2017-02-24

On the Flow Master can you tell me the diameter of the oval tips and also is this T304 Stainless?

Asked by: DMAR
The oval tips are 3-1/4" x 3-3/4" and the system is made of 409S Stainless Steel.
Answered by: CJPP Dave
Date published: 2016-12-28

Will the exhaust cause check engine light 

Asked by: Justin1204
Answered by: CJPP Dave
Date published: 2016-12-27

I buy this item 1 year ago it is amazing But I need to do some upgrade so which down pipe will fit this my focus is 2014

Asked by: Yahia
We offer several downpipes that will fit, in the "Refine Your Search" choose your year make and model in the drop down boxes, than in the type drop down choose exhaust down pipes, there you will find all the down pipes we offer for the application chosen.
Answered by: rk cjpp
Date published: 2016-12-27

Hello, I'm interested in this exhaust but would need it sent to the uk. Could you sent me information regarding cost of shipping. thanks

Asked by: Alan Mather
To get a shipping quote and total price, add the item(s) to your shopping cart and then proceed to checkout. In checkout, fill out your address info and scroll down to see shipping options and costs to your area including any import taxes and duties.
Answered by: CJPP Dave
Date published: 2016-10-07
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