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Stainless Works Long Tube Headers and High Flow Catted X-Pipe Kit (11-14 GT)

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  • Item #101825

  • Market Price $1,714.99
  • You Save 9% ($156.99)
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  • Increases horsepower and torque
  • Raspy race car growl
  • Long Tube header design
  • Free flowing 1-7/8" mandrel-bent tubing
  • Stainless steel construction - natural finish
  • Matching high-flow catted shorty X-pipe included
  • Intended for off-road, track use only
  • Fits 2011-2014 GT Mustangs
More Horsepower And Torque. Improve the performance of your 5.0L Coyote powered Mustang throughout the entire RPM range with a Stainless Works Long Tube Header and Catted Shorty X-Pipe combo kit from AmericanMuscle. This Stainless Works Header and X-pipe kit will greatly improve your 5.0L Mustangs exhaust flow over the restrictive stock factory manifolds and mid-pipe to significantly increase your Pony's horsepower and torque.

Superior Construction. Manufactured from 1-7/8" mandrel bent 304 stainless steel tubing for superior airflow, Stainless Works Long Tube Exhaust Headers are TIG welded and feature a one piece 3/8" thick header flange for added strength and optimal leak-free performance.

Race Car Growl. The included Stainless Works 3" diameter 304 stainless steel high-flow catted X-pipe not only improves exhaust flow to increase power, but it also adds a crisp raspy, race car growl to the sound of your Mustangs exhaust with its modern merged "X" crossover design.

Recommended Upgrade. To realize the full power potential that this Long Tube Header and Catted Shorty X-Pipe combo kit 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. This Stainless Works Long Tube Header and Catted X-pipe combo kit is specifically designed to fit the 2011 to 2014 GT Mustangs equipped with the 32-valve DOHC coyote 5.0L V8 engine.

Technical notes. This Stainless Works product may not be legal for use on pollution controlled motor vehicles; intended for off road use only.

Mustang Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • Long Tube Headers
  • Catted X-Pipe
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Finish: Natural
Type Mid Pipe Required: Shorty - Included Fitment: 2011-2014 GT Mustangs

Mid Pipe Specifications
Style Mid Pipe: Shorty "X" Type Headers Required: Long Tube - Included
Piping Material: Stainless Steel Piping Size: 3"
Catalytic Converter: "Yes" Fitment: 2011-2014 GT Mustangs
Will it fit my Mustang?
  • GT - 11, 12, 13, 14

Customer Photos

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Q & A Ask a Question

Just wondering does this system also fit the 12-13 Boss? I would assume it would seeing as how they are both 5.0's and of the same design. Just curious if these do not then what headers do fit the Boss 302? Also looking at catbacks as well I see models for the GT but not the Boss is this the same case as well. Thanks for the help.

spdkills83 Year: 2013 Model: Boss

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out of 5 stars

1 Customer Recommends this Product

Installation Time:Full Day

  • Loudness / Volume: 5 5/5
  • Exhaust Note: 5 5/5
  • Fit & Finish: 5 5/5
  • Bang For Your Buck: 5 5/5
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  • 5/5 Yes, I recommend this product

    June 09, 2014

    Best investment!

    The installation was rough, took almost a full 24 hours of work. High recommend following the instructions provided by Stainless Works, but be prepared they are very vague and we ran into some minor issues. Absolutely worth the work! The car just sounds unreal! I can definitely feel a big difference in HP gains, also some minor MPG gains as well.


    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1

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