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Kooks 1-3/4 in. Long Tube Off-Road Headers (15-17 GT)

Market Price $1,813.99 You Save 15% ($264.00)
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  • Item 386633
  • MPN# 1151H210

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Quoted installation from $125

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Ship to: ASHBURN - 20146
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    Features & Details

    • Increases RWHP and Torque
    • Long Tube Header Design
    • Off-Road Connection Pipe
    • Free Flowing 1-3/4" Mandrel-Bent Tubing
    • 304 Stainless Steel Construction
    • 3" Collectors w/ Scavenging Spikes
    • Fits Left Hand Drive Models Only
    • Fits 2015-2017 GT Mustangs
    More Horsepower and Torque. A set of Kooks Long Tube Headers with off-road Connection Pipe will significantly improve the performance of your S550 GT. Kooks Headers feature an integrated venturi style collector that increases exhaust scavenging and reduces turbulence. As a result, it will improve your Mustang's exhaust flow over the restrictive factory manifolds, boosting your horsepower and torque numbers.

    Quality Construction. These Kooks Long Tube Headers are manufactured from 1-3/4" mandrel bent 304 stainless steel tubing that merges into 3" collectors with scavenger spikes for superior airflow. These headers feature a leak-free ball and socket design for optimal performance and a better than OEM fit.

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

    Application. These Kooks 1-3/4" Long Tube Off-Road Headers are specifically designed to fit the 2015-2017 5.0L GT Mustangs and is a direct bolt on to the factory exhaust system.

    Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off road use only.These Headers are intended for left hand drive applications only.

    Fitment: 2015 2016 2017 Details

    What's in the Box
    • (2) Long Tube Headers
    • (1) Catted Connection Pipe Assembly
    • (2) Gaskets
    • (2) Clamps
    • (16) Small Bolts
    • (8) Flat Washers
    • (4) Long Bolts
    • (4) Nuts
    • (1) O2 Connector
    Installation Info
    Tech Specs
    Header Specifications
    Header Type: Long Tube Type Mid Pipe Required: Stock Factory
    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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    Customer Reviews (3) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$500-$1000

    • Performance Gain 4.666667 4.7
    • Fit 5 5

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      August 06, 2017

      They are great but super loud.

      It's just way way too loud. It's practically not drivable in regular streets/roads. But since they are off road headers then it's fine but I will warn you now that if ur thinking of getting these for daily driving then just be ready to get some tickets and cops pulling you over cuz again it's just race car loud really but does sound really good.


      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      July 07, 2017

      2015 Gt

      Great headers plenty of power with the correct tune.


      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      April 08, 2016

      The sound of this is amazing. Loud but not overwhelming.

      Loud but not overwhelming. Very easy to install, the price is reasonable. I would recommend this to everybody.


      Year: 2016 Submodel: Ecoboost

      Helpful (1)

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