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Magnaflow Competition Cat-Back Exhaust (15-17 V6)

Market Price $1,577.52 You Save 32% ($501.94)
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  • Item 390880
  • MPN# 19099

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Features, Video & Details

  • Aggressive Muscle Car Sound
  • Improves Exhaust Flow for More Power and Sound
  • Straight-Through Competition Mufflers
  • Free Flowing X-Pipe Included
  • Durable 409 Stainless Steel Construction
  • 2.5" Mandrel-Bent Tubing - Steps Up From 2.25"
  • Mirror Polished, 4.5" Stainless Steel Tips
  • Direct Bolt-on Replacement
  • Fits 2015-2017 V6 Mustangs

Review & Installation Video

Review & Install Video

Hey, guys. Justin here with with my detailed review of the Magnaflow Competition Cat-Back Exhaust system available for your 2015 and newer V6 Mustang. You should be checking out the Competition Series from Magnaflow if you're looking for a top quality cat-back made from 100% stainless steel and one that's going to provide a very deep and aggressive tone for your V6. Magnaflow's without a doubt one of the best-known names in the industry, and for good reason, guys. They consistently offer great quality, fitment, and tone, and that certainly applies here with the Competition Series. You guys heard the clips already. You know what this thing sounds like. But in my opinion, it's going to be one of the best systems available for the 3.7-liter motor because of how it sounds. It delivers a very aggressive tone, as is the case usually with the Competition Series from Magnaflow, but it's not going to be over the top. In fact, I think it offers some great street manners. It's going to be whisper quiet on the highway, but it's going to turn a bunch of heads when you get on it. So for that reason alone, strong four out of five on my one to five, or one to wake the neighbors scale. Breaking down the materials a little bit further here, with the Competition Series, guys. You are going to find, again, that 100% full stainless steel build throughout, 409 grade to be exact, two and a half inch mandrel bent tubing, including the X pipe here for the mid pipe, straight through Competition Series mufflers again, all exiting out the rather large four and a half inch polished tips etched with the Magnaflow logo. Now I do want to point out I think the four and a half inch tip is the perfect size for the S550 cars. It seems to fill out the holes in the bumper perfectly, without being too big or too small. This system is made in the U.S.A. and is backed by a lifetime warranty for the materials if you should ever need it. Now I do have one small little nitpick here. I would have preferred to see a 304 grade stainless steel, as opposed to the 409 used with this system, especially at this price point. But overall, not a huge deal, and it's certainly not going to affect the performance. The Magnaflow does feature a clamp or bolt on design, meaning no cutting, no permanent modification needed whatsoever. So that's going to make for a very easy one out of three wrench job for you guys. This thing can be bolted on in roughly an hour or two from start to finish using nothing more than a basic socket set. Using the sound clips and my review, hopefully, you guys have a better idea of what to expect with the Magnaflow Competition and if it's the right system for you. Now what I can tell you is that this thing is built extremely well, bolts right up without issue, and delivers one of the best sounds I've heard with a 3.7 Mustang to date. So be sure to learn about the Magnaflow stuff for your ride here at

Aggressive Muscle Car Sound. The 2015-2017 V6 Mustangs ship from the factory with an understated exhaust note for those drivers not looking to attract to much attention. But, when your packing 300 horsepower and 280 ft-lbs of torque under the hood who wouldn't want to attract a little extra attention? A Magnaflow Competition Cat-Back with its straight-through mufflers and a free flowing x-pipe will help unleash all the aggressive muscle car sound that the Mustang's 3.7-liter V6 engine has to offer.

More Power and Better Performance. A Magnaflow Competition Cat-Back Exhaust not only improves the sound of your V6's exhaust, but also improves its power and performance as well. By reducing back pressure and improving exhaust flow, you will see an increase in rear wheel horse power and torque.

Magnaflow Quality. Magnaflow manufactures their Cat-Back Exhaust systems right here in the USA with pride. Magnaflow Competition Cat-Back's are mandrel-bent from 2.5" diameter, premium grade, 409 stainless steel tubing for outstanding exhaust flow and enduring corrosion resistance. This system includes an X-Pipe and two high flow, straight-through Competition mufflers. The mufflers feature a pair of mirror polished 4.5" tips that exit in the stock location for impressive muscle car looks.

Direct Bolt-on Upgrade. Magnaflow's Competition Cat-Back Exhaust with X-Pipe bolts straight up in the stock location with no cutting or extra modifications required. Installation of this Magnaflow Cat-Back can be completed in about two hours with just basic hand tools.

Application. This Magnaflow Competition Cat-Back Exhaust with X-Pipe is designed to fit both the fastback and convertible 2015-2017 Mustangs equipped with the 3.7L 4V Ti-VCT V6 engine.

Note: Coupon codes cannot be applied to this product.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (1) Right Muffler Assembly
  • (1) Left Muffler Assembly
  • (1) Right Over Axle Intermediate Pipe
  • (1) Left Over Axle Intermediate Pipe
  • (1) X Pipe Assembly
  • (4) Clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished 409 Stainless Steel
Piping Size: 2.5" Tip Size: 4.5"
Muffler Type: Straight-through Fitment: 2015-2017 V6
Will it fit my Mustang?
  • V6 - 16, 15, 17

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Most Helpful Reviews

Best option for the V6

This exhaust sounds much much better in person, so if you like what you hear in the video, expect it to be 100x better in person. As for installation, basic hand tools definitely dont work. Bolts underneath ...

Read More
Helpful (2)


This exhaust installation was so easy, plus it's so loud in the lower rims and deep for a v6. I got asked if it was a v8 and I just laughed. Seriously turns heads, would recommend.

Helpful (1)

Overall Rating 4.1 out of 5 stars
Read All 7 Reviews

Customer Photos (2) Submit Your Photo

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8 Questions / 6 Answers

Ask a Question

What log tube headers would you suggest pair well with the Magnaflow Comp Cat-Back without cutting/welding?


  • This cat back exhaust utilizes a 3inch exhaust setup, any long tube header would be able to work with this as long a mid-pipe with a 3 inch piping would be used.


Helpful (0)

How exactly loud is this compared to the Cat-Back S-Type? I'm not looking for something to overly loud that would wake the neighbors when i leave for work in the morning.


  • It would be difficult to gauge a sound difference as it is subjective and we have not measured the exhausts decibel readings. Since sound can be subjective and additional engine modifications can alter sound, we would highly recommend listening to a few sound clips of exhaust clips of Mustangs with similar modifications to your application.


Helpful (0)

Will the magnaflow competition cat-back fit along with bbk long tube ceramic headers, and an H mid pipe on a 17' v6?


  • Depending on the mid pipe, some modification may need to be done as the Magnaflow Competition Cat-Back Exhaust comes with an X Pipe.


Helpful (0)

Will this affect the cars warranty.


  • Hello! I recommend checking with your local dealership. Some dealerships are very reasonable and some dealerships are very strict when it comes to modifying a vehicle under warranty.

    Doug P

Helpful (0)

Please share what's the output sound measurement for this exhaust? Our country rules here is to be maximum 90 Decibels - thanks


  • Hello! We do not have an exact dB output level for the Magnaflow Competition Cat-Back Exhaust.


Helpful (0)

Will this system work with the BBK short tube headers?


  • This system will work with BBK shorty headers as long as you have a downpipe that can connect them to the mid-pipe.


Helpful (0)

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Customer Reviews (7) Write a Review

Overall Rating 4.1

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4 4
  • Exhaust Note 4.142857 4.1
  • Fit & Finish 4.571429 4.6
  • Bang For Your Buck 3.571429 3.6

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    January 08, 2017

    Best option for the V6

    This exhaust sounds much much better in person, so if you like what you hear in the video, expect it to be 100x better in person. As for installation, basic hand tools definitely dont work. Bolts underneath the car rust pretty quickly, so unless you're working on a brand new car that never touched the road then expect to be needing to use air tools because the bolts won't budge from the rust. Believe me I tried to do it myself but I ended up deciding to spend $150 to get it done at a shop.


    Year: 2015 Submodel: V6

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    September 10, 2017


    This exhaust installation was so easy, plus it's so loud in the lower rims and deep for a v6. I got asked if it was a v8 and I just laughed. Seriously turns heads, would recommend.


    Year: 2016 Submodel: V6

    Helpful (1)

  • 1/5

    Installation Time: Afternoon

    June 19, 2017

    Buyer Beware!!!

    Just got this system installed on my 2016 Mustang Convertible and I hate it. The drone is extreme and and makes my car sound like a civic with no muffler.. Getting it taken back off tomorrow. Waste of money!!!


    Year: 2016 Submodel: V6

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    May 15, 2016

    Great Sound!

    I wanted a more deep sound and it certainly was better than the stock setup! Might upgrade to a GT but for now this works just fine.


    Year: 2015 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    October 13, 2017

    Amazing sound!!

    This exhaust is absolutely amazing! I love it! It's really loud too. I just got it put on today (9/13/17), so I still have to break it in, but so far I'm really excited about it and I don't have any complaints.


    Year: 2016 Submodel: V6

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    August 08, 2017


    Sounds great, came in a day early, very happy with the turn out. Fits perfectly on my 2017 mustang.


    Year: 2017 Submodel: V6

    Helpful (0)

  • 4/5

    Installation Time: Afternoon

    July 02, 2017


    nice quality super easy install looks good sounds better than stock!!!!!


    Year: 2017 Submodel: V6

    Helpful (0)

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