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American Racing Headers 1-7/8 in. Long Tube Off-Road Headers w/ X-Pipe - Bottle-Neck Eliminator (15-19 GT)

AmericanMuscle no longer carries the American Racing Headers 1-7/8 in. Long Tube Off-Road Headers w/ X-Pipe - Bottle-Neck Eliminator (15-19 GT). Please check out 2015-2019 Mustang Long Tube Headers for an updated selection.
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Features & Details

  • American Racing Headers Bottle-Neck Eliminator System
  • Increases Rear Wheel Horsepower and Torque
  • Long Tube Header Design - 1-7/8"
  • X-Pipe Included - Eliminates Factory Resonator
  • 3" Mandrel-Bent Tubing
  • 304 Stainless Steel Construction
  • Intended for Off-Road, Track Use Only
  • Made in the USA
  • Fits Left Hand Drive Models Only
  • Fits 2015-2019 GT Mustangs with a 3" Aftermarket Cat-Back
More Horsepower And Torque. Improve the power and performance of your 5.0L coyote S550 Mustang with an American Racing Headers Off-road 1-7/8" Long Tube Header and X-Pipe Bottle-Neck Eliminator System. These American Racing Headers and X-Pipe will considerably increase your GT Mustangs exhaust flow, when compared to the restrictive factory manifolds and resonator Mid Pipe, for a significant improvement in rear wheel horsepower and torque.

Race Car Growl. The included X-Pipe not only eliminates the factory resonator to help 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.

Quality Construction. American Racing Headers are manufactured in the USA from mandrel-bent 1-7/8" diameter 304 stainless steel tubing that merges into 3" collectors with scavenger spikes for superior exhaust flow. These long tube headers feature a one piece 3/8" header flange for additional strength, leak-free performance and an OEM style fit.

Required Upgrade. To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle highly recommends a custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

Cut & Clamp Installation. American Racing Headers designed their 3" Bottle-Neck Eliminator System to work in conjunction with most aftermarket 3" catbacks to eliminate the 3" to 2.5" step down restriction created by other 3 inch exhaust systems. Installation will require cutting and clamping the aftermarket 3" catback to fit into the included Mid Pipe. Clamps and detailed instructions are provided.

Application. This American Racing Headers 1-7/8 x 3 in. Off-road Long Tube Header with X-Pipe Bottle-Neck Eliminator System is designed to fit both Fastback and Convertible 2015-2019 GT Mustangs equipped with the coyote 5.0L DOHC V8 engine. Requires the use a 3" aftermarket catback exhaust for proper installation.

Technical Note. Long tube headers are not legal for use on pollution controlled motor vehicles; they are intended for off road use only.These Headers are intended for left hand drive applications only.

Fitment: 2015 2016 2017 2018 2019 Details

MPN# MTC5-15178300BEXNC

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Driver side header
  • (1) Passenger side header
  • (2) Off-road connection pipes
  • (1) X-pipe
  • (2) Header gaskets
  • (4) Oxygen sensor extension
  • (6) Clamps
  • (1) Bracket
  • (16) Bolts
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Type Mid Pipe Required: Included
Material: 304 Stainless Steel Finish: Natural
Catalytic Converter: "No" - For off-road use only Fitment: 2015-2017 GT Mustangs
Will it fit my Mustang?

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Questions & Answers (7)

5 Top Rated Questions

Will these eliminate the x/pipe on a magnaflow competition cat back, or would the system end up with a double x-pipe. I see there is cutting involved. Is that before or after the magnaflow x-pipe?

  • Hey William, These would replace your existing x-pipe by cutting it out, and whats left of the catback is what would then attach to the headers.

Helpful (2)

When will these be available again?

Will these headers also delete the cats on your car ?

  • The American Racing Headers 1-7/8 in. Long Tube Off-Road Headers w/ X-Pipe will delete the factory catalytic converters.

Helpful (0)

Will this fit on a Mbrp street installer series cat back?

  • As long as it is a 3 inch cat-back exhaust, this header/x-pipe combo kit will fit. Please note that the x-pipe included in this kit will require removing the mid-pipe used with the cat-back exhaust for proper installation.

Helpful (0)

Will these headers and along with any other 15-17 headers fit the new 2018 mustangs?

  • The American Racing Headers 1-7/8 in. Long Tube Off-Road Headers along with any other headers not specifically made for the 2018 mustangs will not work for your applications and we can not recommend them for your year vehicle.

Helpful (0)
Post Your Question
2 More Questions
Hey I have the Corsa Extreme car back with double helix x pipe will this bolt right up? Essentially is this the correct 1 7/8” system with the least install issues for my setup ? 1 answer
Will these pair right up with the Roush axle backs or would i need to add extra pipe for a true 3 inch system? 1 answer

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Customer Reviews (4) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Weekend

Installation Cost:$500-$1000

  • Loudness / Volume 4.75 4.8
  • Exhaust Note 5 5
  • Fit & Finish 5 5
  • Bang For Your Buck 4.75 4.8

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    February 09, 2018

    Sounds awesome!

    Great product. Left it to the pro's. Gained 55 hp to the Wheels. 632 before to 687 after!


    Year: 2015 Submodel: GT

    Helpful (8)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    November 03, 2016


    I recommend ARH for everyone has mustang specially s550 they gained more HP than the other brands


    Year: 2016 Submodel: GT

    Helpful (11)

  • 5/5

    May 26, 2016

    Great product

    These headers are a great add to you mustang if you are looking for performance and for sound as well. To me a stock gt is to quiet and this adds the exhaust sound that I was looking for, great product for your mustang.


    Year: 2016 Submodel: GT

    Helpful (10)

  • 5/5

    Installation Time: Full Day

    May 24, 2016

    Pure sound

    Starting the car in the morning has neve been so pleasing as this before. The neighborhood knows when I'm leaving for work. The sound is absolutely perfect!


    Year: 2015 Submodel: GT

    Helpful (10)

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