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Stainless Works 1-7/8 in. Long Tube Headers & High Flow Catted H-Pipe Kit (11-14 GT500)

Item 101819
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Market Price $2,192.36 You Save 12% ($252.22)
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases Horsepower and Torque
      • Classic Muscle Car Rumble
      • Long Tube Header Design
      • Free Flowing 1-7/8" Mandrel-Bent Tubing
      • Stainless Steel Construction - Natural Finish
      • Matching High-Flow Catted Shorty H-Pipe Included
      • Intended for Off-Road, Track Use Only
      • Designed and Manufactured in the USA
      • Fits 2011-2014 Shelby GT500 Mustangs


      More Horsepower And Torque. Improve the performance of your high powered Shelby GT500 throughout the entire RPM range with a Stainless Works Long Tube Header and Catted Shorty H-Pipe combo kit from AmericanMuscle. This Stainless Works Header and H-Pipe kit will greatly improve your Shelby Mustangs exhaust flow over the restrictive factory manifolds and Mid Pipe to significantly increase your Pony's horsepower and torque.

      Superior Construction. Manufactured in the USA 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.

      Muscle Car Rumble. The included Stainless Works 3" diameter 304 stainless steel high-flow catted H-Pipe not only improves exhaust flow to increase power, but it also adds a deep muscle car rumble to the sound of your Mustangs exhaust with its modern merged "H" crossover design.

      Recommended Upgrade. To realize the full power potential that this Long Tube Header and Catted Shorty H-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 H-Pipe combo kit is specifically designed to fit the 2011 to 2014 Shelby GT500 Mustangs equipped with the supercharged DOHC 32-valve 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.

      Fitment: 2011 2012 2013 2014 Details

      MPN# GT115HCATHP

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (1)

      Write a Review

      Ratings Summary

      5 out of 5 overall rating from 1 customers

      • July 28, 2016

        5 2012 GT500 - Wyomann

        Sounds amazing and slight performance gain

        The sound I have after installing the long tube headers and h-pipe is awesome!! Deep rumbling sound and gets loud when I accelerate. Sounds mild at cruising, but loud when accelerating hard. Perfect combo for my tastes. I didn't install it myself and t he cost of install was about a grand :(

        Helpful (15)

      Questions & Answers (4 answers)

      4 Top Rated Questions

      I see that this product claims to significantly increase the horsepower and torque. So my question is about how much of an increase are we talking? Approximately?

      • Horsepower gains with the Stainless Works 1-7/8 in. Long Tube Headers and High Flow Catted H-Pipe Kit will vary based on the modifications you have already done to your car, however on average we see gains of around 20-25hp with equivalent gains in torque.

      Helpful (3)

      I see the picture shows the O2 sensor extensions come with it, but the parts list doesn't say they are included. Are they included or will they need to be purchased separately?

      • The O2 extensions are apart of the kit. The photo would be the included hardware that would come with the Stainless Works 1-7/8 in. Long Tube Headers & High Flow Catted H-Pipe Kit.

      Helpful (2)

      Can this be fitted to a 2014 gt

      • This particular version of the Stainless Works LT Header is specifically designed for the GT500... not the GT coyote...

      Helpful (1)

      I live in a part of Oregon that requires emission testing every two years. Since this item includes high flow cats, will I need to worry about additional smog emissions from the 2013 GT500, or will it report the same emissions as factory cats?

      • The legality of the Stainless Works 1-7/8 in. Long Tube Headers & High Flow Catted H-Pipe Kit will depend on your state/counties emission restrictions. We recommend consulting with your local DMV to confirm if this is a part that can be installed on your Mustang legally. 

      Helpful (0)
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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • Long Tube Headers
      • Catted H-Pipe

      Tech Specs

      Header Specifications
      Header Type:Long TubeFinish:Natural
      Type Mid Pipe Required:Shorty - IncludedFitment:2011-2014 Shelby GT500 Mustangs

      Mid Pipe Specifications
      Style Mid Pipe: Shorty "H"Type Headers Required:Long Tube - Included
      Piping Material:Stainless SteelPiping Size:3"
      Catalytic Converter:"Yes"Fitment:2011-2014 Shelby GT500 Mustangs

      Will It Fit My Mustang

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