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Flowmaster Outlaw Cat-Back Exhaust w/ X-Pipe - Stainless Steel (13-14 GT)

39 Reviews
Our Price

$830.97

  • Item #18444
  • MPN# 817590

  • Market Price $939.00
  • You Save 12% ($108.03)
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Product Videos Customer Photos
Features
  • Super Aggressive Flowmaster Outlaw Sound
  • 409 Stainless Steel Construction
  • 3" Mandrel-Bent Tubing
  • 4" Polished Stainless Steel Tips
  • Includes Scavenger X-Pipe and Two Flowmaster Outlaw Mufflers
  • Fits 2013-2014 GT
Description
Super Aggressive Flowmaster Sound. Give your coyote powered Mustang that unmistakable Flowmaster sound with the Outlaw Series Cat-Back exhaust system from AmericanMuscle. This system improves exhaust flow using Flowmaster's race-oriented style Outlaw mufflers for that super, aggressive exhaust note your high powered Pony deserves.

Race Car Growl. The included Scavenger X-Pipe not only helps increase power, but it also adds a loud raspy, race car growl to the sound of your exhaust with its modern "X" crossover pipe design.

Reuses Stock Cats. The included Flowmaster Scavenger X-Pipe bolts up directly behind the factory catalytic converters with no cutting required saving you time and money. By reusing your stock catalytic converters, you ensure that your Mustang is smog-legal.

Stainless Steel Construction. Constructed from durable 3" diameter 16 gauge 409 stainless steel tubing for it's corrosion resistant properties the Flowmaster Outlaw Cat-Back features two race-oriented mufflers with massive 4.0" diameter polished stainless steel tips for impressive muscle car looks and sound. As an added bonus the tips are embossed with the "Flowmaster" logo for true custom styling.

Application. This Flowmaster Outlaw Series Stainless Steel Cat-Back exhaust system is designed to fit the 2013-2014 5.0L coyote Powered GT Mustang equipped with either aftermarket shorty headers or the factory manifolds. Does not fit Shelby GT500 models.

Fitment: 2013 2014 Details

What's in the Box
  • (1) Right muffler assembly
  • (1) Left muffler assembly
  • (1) Scavenger X pipe assembly
  • (1) Right intermediate pipe
  • (1) Left intermediate pipe
  • (4) Band clamps
  • (2) Hanger keepers
Installation Info
Tech Specs
Axle-Back Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 3" Tip Size: 4.0"
Muffler Type: Straight-through Fitment: 2013-2014 GT
Will it fit my Mustang?
  • Boss 302 - 13
  • GT - 13, 14

Most Helpful Reviews

5/5
Just what I expected

After listening to the sound clips on the website I decided the Outlaw was what I wanted. It's definitely louder in person, but was just what I wanted. As an installation note, I would say you should have ...

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Helpful (1)

5/5
Freaking louder than loud

This product is ABSOLUTELY LOUD. At the first cold start it rumbles like no other exhaust and does so at every cold start. At 2k rpm there is a slight drone but hey who cares. The tip somewhat touches ...

Read More
Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 39 Reviews

Review & Install Video

Customer Photos (12) Submit Your Photo

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12 Questions / 6 Answers

Ask a Question

Does this system delete the resonators on my 2014 GT?

Ronny

  • Yes It retains the cat down pipes though. But still very loud. That's a good loud though!!!

    CMR81

    Good Answer (0) (0)

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This and off road Xpipe I am trying to decide the best exhaust system. I was thinking of going with these Outlaw cat back but I also want to eliminate the cat's so I was thinking Pypes off road x pipe. These look like they have an X pipe. Will the two work together or should I go with Option 2, the Pypes super cat back?

NaplesStang

  • The flowmaster system offers a 3 inch diameter rather than 2.75 inches. But if you want sound and performace go with the outlaw cat back for the sound and the pypes catless xpipe. I see no problem and it should fit.

    Nimair786

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

Long Tube Header Compatibility Would I have any issues installing LT headers with this catback? I was looking at the ceramic BBK long tubes for my 2014 and I was just wondering if they were compatible with the x-pipe that is included with the catback.

JamesO

  • No. I believe you would need a shorty mid pipe to work with the longtubes.

    Alex3209

    Good Answer (0) (0)

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Customer Reviews (39) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.945946 4.9
  • Exhaust Note 4.891892 4.9
  • Fit & Finish 4.567567 4.6
  • Bang For Your Buck 4.864865 4.9



  • 5/5

    Installation Time: Afternoon

    June 02, 2016

    Just what I expected

    After listening to the sound clips on the website I decided the Outlaw was what I wanted. It's definitely louder in person, but was just what I wanted. As an installation note, I would say you should have 2 extra OE exhaust clamps before starting, as the install requires that you reuse a pair, and I found mine to be nearly impossible to take off undamaged and usable. Other than that, very easy install. There is a drone to the exhaust at 2000 rpm, but it's worth the irritation, because this system sounds like an animal at higher revs. It is very loud, so you won't be sneaking up on anybody with this exhaust. Love the sound.

    Lucky13

    Year: 2013 Model: GT Driving Style: Daily Driver

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    August 23, 2014

    Freaking louder than loud

    This product is ABSOLUTELY LOUD. At the first cold start it rumbles like no other exhaust and does so at every cold start. At 2k rpm there is a slight drone but hey who cares. The tip somewhat touches the bumper but all you have to do is put your shoe inside the tip and yank it down and to the right a little. Installation was quick and easy and you can feel the performance difference this exhaust offers. This exhaust is great if your looking for the best sound and somewhat performance. I would recommend this to every mustang owner.

    Nimair786

    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Richmond, TX, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    April 07, 2014

    Very angry note!

    Very aggressive exhaust system. I love it personally!! I couldn't be anymore pleased with this product! Already have had several compliments and head turns! My father said it makes my automatic v8 sound like a manual when I let of the gas! Very pleased!!!

    Bluethunder13

    Year: 2013 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Martinsburg, WV, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    November 11, 2012

    LOOOOOOUD! BE AWARE!

    This system is ABSOLUTELY LOUD! I'm afraid to hit over 2k RPM in Koreatown, Los Angeles where I live. There are lots of cops out there. I have watched Outlaw axle-back in YouTube, but I haven't really watched Outlaw catback one there. I expected a little louder or higher tone than the axle back, but it was totally out of my expectation. A LOT OF LOUDNESS!! BE AWARE. The thing that you have to know before you order one. Yes, this system is very loud like ready-to-track one. Secondly, there is big big drone at 2000 RPM which range is cruising RPM in the highway. It may annoy your ears if you're not the type of person like a racer. Thirdly, it doesn't make sound in every single RPM. I can't explain it but it's like changing the sound in certain RPM, and it feels like there is no sound between the ranges(in the cockpit). So BE CAREFUL! I drifted the car during left turn and even in the straight line, and it wasn't my purpose because I couldn't hear the sound. For the performance, I haven't felt noticeable difference.

    LAkoreanGangstaMustang

    Year: 2013 Model: GT Driving Style: Race 'Stangs I have owned: 1 Los Angeles, CA, USA

    Helpful (9) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    January 16, 2013

    Best deal around, better than i expected.

    This is my 4th Mustang and I have used Flowmasters, Borla and Pypes in the past. I know the new 5.0 Coyote is a real animal and a good set of pipes would go a long way but this was even more than i could have hoped for. My last Stang was an 03 Mach 1 with the 4 valve 4.6. I had Borla and Flows on it I thought that sounded amazing until I started this bad boy up with the new Outlaws on it. At cold start it has a rumble like I have never heard from a street car, it will just slap a huge smile on your face. After a few seconds it mellows out a bit but it still has the deep rumble we all crave. Once you start driving you hear a mix of FORD V8 power and a strong race inspired growl. The most impressive thing for me is the fact that mine is an auto but you still get those aggressive downshift sounds you would get from a manual when you slow down or come to a stop. As far as performance, i never expect a lot from Flowmasters, i see them as the best sounding system and that's what i wanted but to my surprise I got the power also. This thing kicks my a** off the line now instead of that awkward smooth take off FORD created for us for some reason. I had a local shop do the instal for me because i don't have a lift and I didn't want to have to fight with the stock system under a car on jack stands. My install was only $150, can't beat that. I would highly, HIGHLY recommend this system to anybody that wants a very loud and aggressive ride. I feel like making constant left turns when i am driving this now. Thank you Flowmasters!

    Impact13GT

    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 4 Lake Worth, FL

    Helpful (6) (0)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    August 19, 2013

    Very Loud, Annoyingly So At Times

    This was way louder than I expected it to be. I absolutely love the note and volume, and it definitely turns heads when you go by. I've had numerous people compliment me on it. The only downside is how loud it is inside the car. It's loud enough that conversation with someone can be quite tough at times. The drone at 2k RPM is borderline intolerable. You'd better have the Shaker audio system in your car to drown it out or you'll go insane. The interior noise from this system makes using the voice commands for SYNC damned near impossible. Interior noise seems to be less if the windows are down. (No help if you're going to be driving the car year round though.) I received the product faster than expected. The box was banged up upon receipt, but I suspect that was more the fault of UPS than that of American Muscle or Flowmaster. The black paint on the mufflers was scratched off in a couple of places when I opened the box, but it didn't concern me since it wasn't going to be visible anyway. Not sure whose fault that was. The exhaust tips were unmarred though, and there weren't any dents or other damage anywhere. I'd recommend this exhaust for track use or a pleasure vehicle you only take out once in awhile. I WOULD NOT recommend it for a daily driver, especially if you use the SYNC system or Bluetooth a lot.

    UnclePony

    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Masontown, PA 15461, USA

    Helpful (4) (0)

  • 4/5

    Installation Time: Afternoon

    January 02, 2013

    sounds great at high rpm

    it to awhile getting the right side exhaust tip from touching my plastic.It kept on turning ,so i had to tack well it.The clamp was not working all that great.But the look,sound and price made up for it

    fastguy

    Year: 2013 Model: GT Driving Style: Street / Strip

    Helpful (3) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 11, 2012

    Great exhaust!

    The exhaust sounds great! It's nice and loud :) it does have a little drone around the 2k range. The install was a breeze everything fit perfect like it should!

    D3AD

    Year: 2013 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Mountain Home, ID 83647, USA

    Helpful (3) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    July 03, 2014

    amazing exhaust!!!

    I have been looking at this exhaust for awhile. I wanted something a lot more aggressive and with a deeper note and this is it. So loud, so aggressive, well worth the money and I highly recommend it for anybody.

    joson87

    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Chesapeake, VA, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    June 02, 2013

    Very nice but very loud

    IF you want to turn heads buy this exhaust. They are extremely loud but sound awesome.

    Panamaraptor

    Year: 2014 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Anchorage, AK, USA

    Helpful (2) (0)

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