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American Racing Headers 1-3/4-Inch Long Tube Headers with X-Pipe; Catted; Long System (15-20 GT)

Item 389166
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Market Price $2,408.99 You Save 13% ($314.24)
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$2,094.75 (kit)

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      Product Information

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


      • American Racing Headers Long System
      • Increases Rear Wheel Horsepower and Torque
      • Long Tube Header Design - 1-3/4"
      • High-Flow Catalytic Converters
      • X-Pipe Included - Eliminates Factory Resonator
      • 3" Mandrel-Bent Tubing (Steps Down to 2.5")
      • 304 Stainless Steel Construction
      • Intended for Off-Road, Track Use Only
      • Made in the USA
      • Fits Left Hand Drive Models Only
      • Fits 2015-2020 GT Mustangs with Factory or 2-1/4" Aftermarket Axle-Back


      More Horsepower and Torque. An American Racing Headers Catted 1-3/4" Long Tube Header and X-Pipe Long System is engineered to increase the power and performance of your 5.0L coyote S550 Mustang. This American Racing Header and X-Pipe combo will significantly improve your GT Mustangs exhaust flow, when compared to the restrictive stock manifolds and resonator Mid Pipe, for a measured increase 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 1-3/4" 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" Long Systems to "step down" at the rear axle, which allows you to reuse your stock mufflers or the 2-1/4" aftermarket axle-back of your choice. Installation will require cutting and reusing the stock muffler assemblies and clamping them in place. Clamps and detailed instructions are provided.

      Application. This American Racing Headers 1-3/4 x 3 in. Catted Long Tube Header with X-Pipe Long System is designed to fit both Fastback and Convertible 2015-2020 GT Mustangs equipped with the coyote 5.0L DOHC V8 engine. Requires the use of the factory or a 2-1/4" aftermarket axle-back 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.

      Please Note.These Headers are intended for left hand drive applications only.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      American Racing Headers MTC5-15134300LSWC

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver side header
      • (1) Passenger side header
      • (2) Catted connection pipes
      • (1) X-pipe
      • (2) Intermediate pipes
      • (2) Header gaskets
      • (4) Oxygen sensor extension
      • (8) Clamps
      • (1) Bracket
      • (16) Bolts

      Tech Specs

      Header Specifications
      Header Type:Long TubeType Mid Pipe Required:Included
      Material:304 Stainless SteelFinish:Natural
      Catalytic Converter:"Yes" - For off-road use onlyFitment:2015-2017 GT Mustangs

      Customer Reviews (3)

        Reviews of American Racing Headers Exhaust products have an average rating of 4.9 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Bullitt - 19, 20
          • GT - 15, 16, 17, 18, 19, 20

          These Headers are intended for left hand drive applications only.

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