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Magnaflow Competition Cat-Back Exhaust (11-12 V6)

Market Price $1,059.59 You Save 32% ($337.14)
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  • Item 48044
  • MPN# 15592

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Features, Video & Details

  • More Power and Torque
  • Aggressive V8 Type Sound
  • 2.5" Mandrel-Bent Stainless Tubing
  • 4" Polished Tips
  • Fits 2011-2012 V6 Mustangs

Review & Installation Video

Review & Install Video

Justin here from, breaking down Magnaflow’s Competition Series Cat-Back exhaust for the 2011 and newer V6 Mustang. This is probably one of the most aggressive kits available for the 3.7L V6, thanks in part to that 2.5” mandrel bent piping, straight through those competition series mufflers, and out the dual 4” polished tips. Now that straight through design is going to totally eliminate a lot of back pressure, making for big power gains, especially in the upper RPM range. Despite that gain in power, you can expect an extremely aggressive exhaust note, so for someone who’s trying to stay under the radar, this might not be the kit for you. The entire kit features 100% stainless steel construction, all the way down to those dual 4” polished tips. You can expect to have everything installed in about two hour’s time. Now let’s hear how Magnaflow’s Competition Series Cat-Back sounds compared to your factory exhaust.

Add Power. Get your 2011-2012 V6 the respect it deserves at the track and strip with a Magnaflow Competition Cat-Back. This free-flowing system will deliver the race-winning horsepower and torque gains you need with the impressive sound you want.

Aggressive Musclecar Sound. Give your 2011-2012 Mustang V6 a deep, aggressive rumble that will make lesser cars clear a path at lights with a Magnaflow Competition Cat-Back. This premium quality exhaust features free-flowing, straight-through Competition mufflers that increase power and give your V6 an unmistakable musclecar sound.

Magnaflow Quality. This premium quality catback is constructed from free-flowing, mandrel-bent 2.5" stainless for superior performance and durability. Finished with dual 4" polished tips, this system looks as good as it performs.

Application. Made to be a direct bolt on, this catback will bolt straight up to the factory hybrid H-Pipe without any extra modifications required on the 2011-2012 V6 Mustang to give it a deeper, more aggressive sound and improved performance.

Note: Coupon codes cannot be applied to this product.

Note. Stock 2011 V6 Mustangs come stock with a Mid Pipe that resembles both the H-Pipe and X-Pipe designs. This hybrid Mid Pipe was created by Ford to help add additional power and sound to the V6 straight out of the factory.

Fitment: 2011 2012 Details

What's in the Box
  • (1) Right muffler assembly
  • (1) Left muffler assembly
  • (1) Right tailpipe assembly
  • (1) Left tailpipe assembly
  • (2) clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 2.5" Tip Size: 4"
Muffler Type: Chambered Fitment: 2011-2012 V6 Mustangs
Will it fit my Mustang?
  • V6 - 11, 12

Most Helpful Reviews

Perfect sounds

Install was a quick and easy, fits great. Sound is deep and never raspy at any rpm. Exactly what I was looking for. Bit pricey but you will enjoy every second of it. Must have!

Helpful (1)

Fit could be better

i just put this n my 2011 red candy mustang, and it is a night an day difference in the exhaust note compared to stock. on the down side, install was not as easy as expected. i had to get the right side ...

Read More
Helpful (1)

Overall Rating 4.4 out of 5 stars
Read All 14 Reviews

Customer Photos (8) Submit Your Photo

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5 Questions / 8 Answers

Ask a Question

Will this fit a 2010 V6 Mustang if I had a local exhaust shop put it on for me?


  • Since this only has fitment for a 2011 & 2012 V6 Mustang, it will take custom fabrication for this to be correctly used since the 2010 V6's came with a factory Y-pipe.


Helpful (0)

Are these louder than the axle-back race series? Based off the video the magnaflow axle-back seems much louder and deeper.


  • The Magnaflow Race Series Axle-Back Exhaust (11-14 V6) will actually be louder than the Magnaflow Competition Cat-Back Exhaust (11-12 V6) because the Competition is a muffler'd exhaust and the Race is a muffler delete.


Helpful (0)

Will this upgrade require a tune? I definitely want to enhance the performance and sound of my v6, however, I don't want to mess with engine tuning until the warranty runs out. So will I need a tune with upgrade?


  • No it's not required but a tune would help maximize the power gain.


Show 1 more answer Helpful (0)

Compatibility Is this setup able to be paired with the bbk long-tube headers and catted x-pipe?


  • I have this set up with the long tube headers and catted x pipe. It works well and sounds aggressive.


Show 1 more answer Helpful (0)

even if theres not an exact number for the hp it gives but how much hp estimated if so?


  • It actually gives you about 10-15 hp and 10-15 torque plus 1-2 miles per gallon, a nice great sound that you will love for sure


Show 1 more answer Helpful (0)

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Customer Reviews (14) Write a Review

Overall Rating 4.4

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.333333 4.3
  • Exhaust Note 4.416667 4.4
  • Fit & Finish 3.75 3.8
  • Bang For Your Buck 3.833333 3.8

  • 5/5

    Installation Time: Less than 1 Hour

    September 26, 2016

    Perfect sounds

    Install was a quick and easy, fits great. Sound is deep and never raspy at any rpm. Exactly what I was looking for. Bit pricey but you will enjoy every second of it. Must have!


    Year: 2012 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 29, 2014

    Fit could be better

    i just put this n my 2011 red candy mustang, and it is a night an day difference in the exhaust note compared to stock. on the down side, install was not as easy as expected. i had to get the right side modified at a shop for a good fit, otherwise the tip was rubbing up on the frame and valence. make sure you have some really high jack stands or a lift.


    Year: 2011 Submodel: V6 Texas

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    September 28, 2012


    I have this paired with the bbk lt's and off road x pipe. all i can say is WOW! its is by far the best sounding exhaust for the 3.7 deep throaty exhaust note and you will be heard.


    Year: 2012 Submodel: V6 Stuart, FL

    Helpful (1)

  • 5/5

    October 25, 2010

    Great performance sound

    I put this on my 2011 mustang v6 and the sound gave it a new life. Definately has a muscle tone, other cars aren't sure if I have a v8 or v6 under my hood. Great item. Just make sure you understand this is the loud version, the street series is not as loud.


    Year: 2011 Submodel: V6

    Helpful (17)

  • 5/5

    May 19, 2011

    Amazing Cat-back

    This system is amazing. It is alot louder then you can tell from any video, and it sounds better then the aftermarket exhaust I had on my old GT! It was easy to instal and fits just right. This system will also cut a good 30-35lbs out of your car.

    Matt H.

    Year: 2011 Submodel: V6

    Helpful (9)

  • 5/5

    Installation Time: Less than 1 Hour

    May 05, 2012

    Great Loud Exhaust!!!!

    I don't know why some people are complaining of drone or this system being loud. It says its the loud, aggressive version and it sounds awesome!!!! It's not raspy either which is why I chose this one and it really changes the tone of the car allowing it to flew its muscle. If you want to be heard and don't mind a loud exhaust version this is the one for you!! The review score doesn't do it justice...this system also fits perfect not sure what the other reviewer is saying and it does cut a good amount of weight out as well.


    Year: 2012 Submodel: V6 San Diego, CA, USA

    Helpful (9)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    July 27, 2012

    Awesome! But...

    First off, this exhaust is awesome! i personally think it sounds better than the Borla ATAK for about half the price. This exhaust is very loud, but not annoying. The fit could have been a bit better, i had my shop guys melt the hangers to center it but took an extra 10min. Got it installed for $95 and when they started it up for the first time, everyone at the shop looked up from what they were doing. Doesn't sound like a V8 but it's as close as you're gonna get with a cat-back. THERE IS a very noticeable drone from ABOUT 2000-2900 rpm but i personally like it. Not raspy at all, very deep though all rpms and sounds fantastic at WOT. if you life in an area where the police are hard a**es (California) when it comes to loudness, try to stay away from this. But if you do buy this you will not be disappointed. Just because it is half the price of Borla does not make it half as good. Looks great too! the polished tips stick out just a bit farther than stock and just look mean! There is a noticeable performance gain. not so much with hp (while there is some of that too), but more so with the decrease in weight. Last thing, if you live in an area with hills, it is quite loud while climbing. Over all, even with drone and slight fitment issues, i would highly recommend this!


    Year: 2011 Submodel: V6 California

    Helpful (5)

  • 4/5

    Installation Time: Less than 1 Hour

    December 08, 2011

    great product

    Very Smooth sound when in higher rpm's, a little more loping when idling or just tapping the gas pedal. looks so so much better than stock exhaust, and gets a lot of compliments. i highly recommend this.


    Year: 2011 Submodel: V6 VA

    Helpful (3)

  • 1/5

    Installation Time: Less than 1 Hour

    October 16, 2011

    The drone is horrible and it rusts worse than any SS exhaust I've ever owned.

    The drone is beyond horrible. It's unbearable between 2200-2900 rpm's. I tried to work with Magnaflow thinking it had to be an issue with the one I got. They were no help and said every aftermarket exhaust is going to drone. Apparently they haven't heard the Borla exhaust I now own....


    Year: 2011 Submodel: V6

    Helpful (5)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 12, 2013


    You will hear the difference!! 1st off let me say that this is no doubt a 2 man job. After thinking I could get it done I ended up taking it to a shop. With tax about $120 - not too bad for Jersey prices. The alignment took a little time to get them to hang evenly and once they were aligned properly there is a noticable difference in what is exposed regarding the L/R chrome tips. Driver side sticks out perfect and passenger side is more flush. Besides that there is really nothing I can complain about. The sound is truly a HUGE difference and instantly you can see everyone turning there heads. I couldn't be more pleased in the sound - nice deep tone and screams when you get on it. I set the cruise at 80MPH and you couldn't hear a drone....crank up the rpms a bit and you will get a drone. But everyone complaining about a drone should stick to their stock exhaust so they can ride in peace. I mean if your considering this system you are buying it for one purpose...TO BE LOUD!!! The sound is just something you need to hear for yourself, no video is going to do it justice. One last feel a huge difference in torque and they weigh 1/2 if not a 1/3 of what the stock exhaust was. Rating: LOUD and Awesome!


    Year: 2012 Submodel: V6 Bellmawr, NJ, USA

    Helpful (1)

  • 3/5

    Installation Time: Shop Install

    November 15, 2011

    There Are Better

    Bad drone in the mid 2000 rpm range and the fit isn't that great. Wish I had gone with another brand.


    Year: 2011 Submodel: V6 British Columbia

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    August 18, 2012

    HOLY COW!!!!!

    WHAT!!!!!!!! is what i yelled when i first fired my car up. this is louder than my 13 GT now!!! great exhaust note and burble at idle and crackle when you let off. this is bad to the bone!!! i am so pleased with this exhaust. don't think about axle backs or other cat backs. put this in your shopping cart and buy it!!!!! i like the drone, but that's just because i want a race car.


    Year: 2012 Submodel: V6 Columbus, OH, USA

    Helpful (1)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 28, 2014

    Magnaflow Competition Catback Exhaust

    Good system and materials (can't go wrong w/SS) however performance gains will certainly vary depending on your setup. Unfortunately I live in CA where smog regulation ruins everything, so really these are only going to change the tone more than anything. It took my local muffler shop about an hour to bolt these up. The only tweaking they had to do was adjust the length on one side, because it was coming up short. They also had to bend the rear hangers because the tips were touching the diffuser. All pretty standard stuff and expected. The sound is great when you get on the throttle and purrs nicely at freeway speed (65mph). My coworkers heard me rev the engine my first day back at work after the install and were full of compliments and curiosity. I still think it sounds like a Subaru, but that's a V6 for ya. Videos on Youtube as well as here on AM are pretty accurate as far as tone.


    Year: 2012 Submodel: V6 San Jose, CA

    Helpful (0)

  • 5/5

    April 19, 2017

    Son's reaction... awesome!

    So it took about 2-1/2 hours for me to install... I did it while car was on jack stands in the garage, with the help of two teens, after cervical discectomy and fusion surgery three weeks before... so I had to take a few breaks. :) Over all I had more problem getting the old exhaust off then getting the new exhaust on. And my son's reaction to his first start... priceless! One happy 18yo who was was so appreciative afterwards, he thanked me twenty times.


    Year: 2012 Submodel: V6

    Helpful (0)

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