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BBK Down Pipe - Catted (15-18 EcoBoost)

Market Price $574.99 You Save 13% ($75.00)
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  • Item 389776
  • MPN# 1809

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Features, Video & Details

  • High Performance Catted Down Pipe
  • 3" CNC Mandrel-Bent Tubing (Steps Down to 2.25"
  • Aluminized Steel Construction
  • High Flow Catalytic Converter
  • Aggressive Exhaust Note
  • Direct Fit Replacement
  • NO Computer Tune Required, but is Recommended
  • Compatible with Factory or Aftermarket Cat-Back
  • Fits 2015-2018 2.3L EcoBoost Mustangs

Review & Installation Video

Review & Install Video

Hey guys, Stephanie with here with this BBK down pipe that's available for all 2015 and up EcoBoost Mustangs. The BBK downpipe is going to be for the EcoBoost owners who are looking for a budget-friendly way to upgrade that restrictive factory downpipe, but with a catted downpipe that allows for a factory or factory-like cat-back setup. The whole point of an aftermarket down pipe is to relieve some of the restriction around the turbo because it is really pretty constricted. Opening up some of the airflow from the turbo can give some nice performance improvements. Basically, when it comes to the turbo, if you're looking for performance, you're pretty much going to want airflow as unrestricted as possible so the turbo can spool quickly.The faster the turbo can spool, the more gains you'll see. So this down pipe that we have here today is catted, but if you're looking to get around that, BBK does offer a downpipe that comes non-catted that's going to cost a little bit less than the catted version here which is typical to see on all exhausts. But looking at this one closer, it is a full three inch mandrel bent pipe with a step down. The step down's going to reduce the three inch down to a two and a quarter inch which leaves the option of keeping a stock cat-back or running an aftermarket two and a quarter inch one. That's one of the nice things about this downpipe. You can pick up the downpipe for some performance gains without having to purchase a complete new cat-back while you're at it unless you want to. Now, three inch is going to be larger than the factory downpipe which is where the less restriction portion of what I've been saying comes from, and if you pick up the uncatted version of this down pipe, then that's going to be even less restrictive. But even the catted version has a high flow cat which is more free flowing than the factory cat is. This option from BBK is made from aluminized steel and like I said before, it's C&C mandrel bent which helps with smoother airflow. So even though the main idea behind an aftermarket downpipe is to help give the turbo unhindered airflow, swapping out your factory downpipe's also going to give you more sound too, especially if you're running the uncatted version. Speaking of going with an off-road version, keep in mind that a new tune will be required since you are eliminating that cat, and it's going to be necessary to tune for that. Even if you are going with the catted version, while a tune isn't necessarily required, it is recommended, especially if you want to be able to realize the full power potential behind upgrading your downpipe. This downpipe is currently the least expensive downpipe that you can get for your EcoBoost but not by a whole lot. It's about 50 to 60 bucks less than the top of the line, and guys like Cook's and Stainless works. So that's just a little food for thought. The catted version costs right around $500, and the off-road version is $100 less. When it comes to the install, luckily this isn't a bad one. You're probably looking at a few hours to get everything done, and I'm going to call this a one out of three wrenches on the scale. This is obviously going to be easier to do on a lift, but, of course, you can get the job done using a jack and stand if you don't have access to one. You won't need anything out of the ordinary, just a few sockets, wrenches and a short extension. You are going to be removing the front and rear 02s for the install, so I'd just make sure to unclip those before you remove or reinstall them so you aren't twisting the wires. Of course, don't forget to make sure to grab the factory downpipe gasket before installing the new downpipe since sometimes that gasket can stick to the turbo. The only other thing I'd say is to line the new downpipe up first before tightening everything down, but that's about it. Only a few bolts and about two hours time for the install. So overall, the BBK down pipe is a three inch downpipe that steps down to work with the two and a quarter inch cat-back. It comes either catted or non-catted, depending on what you're looking for. Not only is this going to increase performance, but it's also going to open up some sound on the EcoBoost as well. You can check this out online more for yourself and see what you think. I'm Stephanie, and for all things Mustang, keep it right here at

Improved RWHP and TQ. Designed as a direct fit replacement on your 2.3L EcoBoost Mustang, this BBK Catted Down Pipe offers improved rear wheel horsepower and torque as a result of its larger diameter tubing. This aluminized 3" Down Pipe also features a high flowing catalytic converter to help increase the overall performance of your turbocharged S550 Mustang.

More Aggressive Sound. Not only will this BBK Catted Down Pipe help increase the power of your Pony, but it will also add a more aggressive exhaust note compared to the stock down pipe. Make sure everyone hears your 2015-2018 EcoBoost coming down the road with the addition of this high quality down pipe.

Aluminized Steel Construction. Manufactured to provide maximum exhaust flow and performance, this BBK Down Pipe features 3" diameter CNC machined mandrel-bent aluminized steel tubing. Complete with a high flow catalytic converter, this Down Pipe would be a perfect fit and complement to either the stock catback or an aftermarket catback system.

Recommended Upgrade. To realize the full power potential that this Down Pipe has to offer, AmericanMuscle highly recommends a Bama Custom Tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

Application. The BBK 3" to 2.25" Catted Down Pipe is designed to fit all 2015-2018 EcoBoost Mustangs equipped with the turbocharged 2.3L engine. This Down Pipe can be installed with either the factory or an aftermarket 2.25" catback exhaust.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (1) Catted Downpipe
Installation Info
Tech Specs
Down Pipe Specifications
Piping Material: Aluminized Steel Piping Size: 3" (step down to 2.25")
Catalytic Converter: "Yes" Type Cat-Back Required: Stock or 2.25" aftermarket 
Tune Required No - but recommended Fitment: 2015-2017 EcoBoost
Will it fit my Mustang?
  • EcoBoost - 15, 16, 17

Most Helpful Reviews

BBC Down pipe - catted

LOUD! Glad I chose catted! These puppies let people know win you are coming or going. Bought with Borla ATAK cat backs.

Helpful (1)

Great sound and power

I like the high quality finish this product has and after it was installed it make a huge difference in the sound of my Ecoboost. I would definitely recommend this to anyone who is looking to add sound ...

Read More
Helpful (1)

Overall Rating 4.3 out of 5 stars
Read All 3 Reviews

Customer Photos

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8 Questions / 6 Answers

Ask a Question

Will I have to get this removed every time I get my car inspected, or will it pass inspection? I live in Missouri.


  • The BBK Down Pipe - Catted will generally pass most states inspections due to the cat. However, each state is different and you will need to check with your local inspection center.


Helpful (0)

Hi, I have a flow master axel back exhaust with a Y pipe, would this still be ok to put on my car?


  • The BBK Down Pipe is compatible with Factory or Aftermarket Cat-Back systems.

    AM MikeW

Helpful (0)

if i dont use tuning program, is engine light on or any error light on? other down pipes are required computer tune but bbk downpipe is not required computer tune. what is the different between other and bbk downpipe?


  • This BBK Catted downpipe does not require a tune. We do recommend on however. A tune will maximize the gains and performance you get from your down pipe.

    AM MikeW

Helpful (0)

Is this catted downpipe California CARB legal? If not, does AM sell a CARB legal downpipe? Thanks


  • Hello! Unfortunately the BBK Down Pipe is not CARB legal. None of the downpipes we carry are CARB legal.


Helpful (0)

What is the shipping weight of this product?


  • The shipping weight of this down pipe will be approximately 19.5 pounds.


Helpful (0)

I read that when you put the DP the car tends to smoke, is it true? i have Y and axel back.


  • When you first install the down-pipe you may have some smoking until the down-pipe is broken in. However after a little while that it is on the down-pipe should not smoke at all!


Helpful (0)

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Customer Reviews (3) Write a Review

Overall Rating 4.3

out of 5 stars

Installation Time:Weekend

Installation Cost:0-$100

  • Loudness / Volume 3.666667 3.7
  • Exhaust Note 4 4
  • Fit & Finish 4 4
  • Bang For Your Buck 3.333333 3.3

  • 5/5

    Installation Time: Afternoon

    June 13, 2017

    BBC Down pipe - catted

    LOUD! Glad I chose catted! These puppies let people know win you are coming or going. Bought with Borla ATAK cat backs.


    Year: 2017 Submodel: EcoBoost

    Helpful (1)

  • 3/5

    May 13, 2017

    Down pipe

    Did not really feel any difference in horse power. I even had new tune done.


    Year: 2016 Submodel: EcoBoost

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    April 09, 2016

    Great sound and power

    I like the high quality finish this product has and after it was installed it make a huge difference in the sound of my Ecoboost. I would definitely recommend this to anyone who is looking to add sound and power to your mustang.


    Year: 2016 Submodel: Ecoboost

    Helpful (1)

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