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Corsa After-Cat X-Pipe (11-14 GT, BOSS)

7 Reviews
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  • Item #100505
  • MPN #14318
  • Market Price $359.99
  • You Save 11% ($40.00)
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  • Converts factory "H" Pipe to an "X" Pipe
  • Improves exhaust flow for more power
  • Raspy race car growl
  • 2.75" mandrel bent tubing
  • 16-gauge 304L stainless steel construction
  • Clamp-on design
  • Reuses stock catalytic converters - Smog Legal
  • Fits 2011-2014 GT and 2012-2013 Boss
Improves Exhaust Flow. Add even more horsepower and torque to the rear wheels of your Mustang by replacing your stock factory H-pipe with a Corsa After Cat X-Pipe. A Corsa X-pipe will greatly improve your pony's exhaust flow for an increase in overall performance. Race Car Growl. This free flowing Corsa After-Cat X-Pipe for the 2011 to 2014 Mustang's not only increases power, but with its modern "X" crossover pipe design it also adds a crisp raspy, race car growl to the sound of your exhaust.

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

Durable Construction. Corsa mid-pipes are constructed from free-flowing 2.75" diameter CNC mandrel bent 16-gauge 304L stainless steel tubing with a merged X crossover design for improved exhaust flow and a long life.

Application. The Corsa After-Cat X-Pipe is a specifically designed for use on 2011 to 2014 5.0L V8 Mustangs including the GT and BOSS models with either aftermarket short tube headers or the stock factory manifolds installed. Installation Note. When installing this X-pipe on a BOSS 302 Mustang you will loose the functionality of the factory Side Exhaust pipes.

Mustang Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • (1) After-cat X-Pipe
  • (3) Clamps
Installation Info
Tech Specs
Mid Pipe Specifications
Style Mid Pipe: Standard "X" Type Headers Required: Shorty or stock manifolds
Piping Material: Stainless Steel Piping Size: 2.75"
Catalytic Converter: Reuses stock Catalytic Converters Fitment: 2011-2014 GT, BOSS Mustangs
  • GT - 11, 12, 13, 14
  • Boss 302 - 12, 13

Most Helpful Reviews View All

Overall Rating 4.6/5 Write a Review
Paired with my Roush axlebacks

Since I am the first to review this product, I feel the responsibility to be here we go: Install: The fit was easy and perfect for my 2013 GT. I tried to do the install myself, but two of

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Helpful (3) (0)

Great sound, superior quality.

Perfect in combination with my Corsa extremes. Can't go wrong.

Helpful (1) (0)

Customer Photos (3) View All

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Reviews (7) Write a Review

  • 5 Stars .57 57%
  • 4 Stars .43 43%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%

out of 5 stars

7 Customers Recommend this Product

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume: 4 4/5
  • Exhaust Note: 4.571429 4.6/5
  • Fit & Finish: 4.857143 4.9/5
  • Bang For Your Buck: 3.714286 3.7/5
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  • 5/5

    Paired with my Roush axlebacks

    April 14, 2014

    Since I am the first to review this product, I feel the responsibility to be here we go: Install: The fit was easy and perfect for my 2013 GT. I tried to do the install myself, but two of the bolt clamps were impossible to remove with the large ratchet/crescent wrenches I own (the bolts are both vertical, with the head end farthest away from the ground). Given the limited space available to remove the clamps, I decided to take it a local mechanic. He said it took him less than an hour total (don't let a mechanic tell you otherwise). Absolutely no welding was required; this is a true bolt-on swap of the stock H-pipe. Sound: I already have the Roush Axleback Exhaust installed. I noticed the idle sound is slightly softer, but the sound at acceleration sounds much better. The X-pipe made the start-up roar much louder, and faster. Already received compliments on the sound, and the very very light drone of the Roush axlebacks has been completely removed. I was happy to that you can go 100mph @ ~2,100 RPM (steady, without accelerating) and the exhaust doesn't make a sound at all. The instant you press the pedal, you get the roar, regardless of your speed. Performance: I did not do a before/after DYNO, but I can honestly say the acceleration is MUCH smoother after installing the X-pipe. With the stock H-pipe, the car seemed to "gulp" upon a heavy press of the gas pedal, but that "gulp" has been almost completely removed. I don't know how else to say it, but the car just seems to be "breathing" easier, and it shows in the acceleration more than anything. Other Comments: - The install is very easy; read the instructions given on the product page (but keep in mind, there are two vertical bolts which are very difficult to unbolt) - No welding is required - Idle is slightly quieter, but the improved roar is noticeable - Night and day difference for full throttle acceleration


    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Houston, TX, USA

    Helpful (3) (0)

  • 5/5

    Great sound, superior quality.

    October 21, 2014

    Perfect in combination with my Corsa extremes. Can't go wrong.


    Year: 2014 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 5+ Gallatin, TN, USA

    Helpful (1) (0)

  • 4/5

    Corsa 2 3/4 xpipe

    August 23, 2014

    Just installed corsa's 2 3/4" xpipe, on my 2014 GT mustang. Corsa did a great job on this product. I love the Quality n the fitment was perfect. The installation was a breeze, n only took a couple of hours to install. Anyone can do the install but a lift is highly recommended. As I knew be for hand. The xpipe did not make the exhaust any louder. The exhaust note did change some, for the better. The engine breathes a whole lot better now. The exhaust flow definitely improve n noticeable at the top end of the RPM rang. I highly recommend corsa's xpipe n looking forward to purchasing more corsa products....... N last but not least. Thank you American muscle for supplying me w all my mustang needs.....


    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Boston, MA, USA

    Helpful (1) (0)

  • 4/5

    Great product!

    January 21, 2015

    Fit was good, only had to loosen it back up once to adjust the alignment. Overall it was all that I expected. Definitely sounds like it flows better than the stock H-pipe. The exhaust volume is quieter at idle, but when you get on it it sounds a lot cleaner. -Nuke Stang


    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Ohio

    Helpful (0) (0)

  • 5/5

    2014 GT 5.0 Abitaman

    December 19, 2014

    I first installed Corsa Extreme axle backs and was happy with the results. Then like a junkie I wanted more so I installed the aft cat corsa xpipe. Well it has a much deeper sound and you can tell an increase in horsepower and torque. The best part is that I didn't have any drone CRUISE QUIET AND GET ON IT AND IT WILL BLAST A ROAR THAT EVERYONE HEARS!! Thanks, American Muscle!!


    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 5 Abita Springs, LA, USA

    Helpful (0) (0)

  • 4/5

    Great quality product

    September 04, 2014

    Definitely better quality than the equivalent BBK after cat X pipe (know someone with it). I have roush axle backs already on the car. This product quieted down the overall loudness. Exhaust has a different tone, as expected. Have not noticed an increase in power at full throttle. If it is there I'm sure it's minimal. Installation was ultra easy. Less than an hour. Rolled up the front of the car onto ramps. My car is a 2014 so it may have been easier since the exhaust wasn't rusted on yet. Never the less, I'm impressed as I like the tone and the product look and finish. I conclude that the bbk pipe is much cheaper and gives you the same "gains" just not the same quality.


    Year: 2014 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 New York, NY, USA

    Helpful (0) (0)

  • 5/5

    Corsa x pipes

    May 23, 2014

    Great product! I have roush axil back exhaust and the two combind make an aggressive sound, just perfect not to loud at low ideal but when stump on they sound like music to my ears!!


    Year: 2012 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Miami, FL, USA

    Helpful (0) (0)

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