Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
1-888-332-7930
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win A 2018 RTR Spec 3 Mustang Enter Now!

Kooks Header and Off-Road X-Pipe Combo - 1-3/4 in. (11-14 GT500)

Market Price $1,728.61 You Save 10% ($172.86)
Our Price

$1,555.75 (kit)

FREE Shipping
  • Item 65525
  • MPN#11422200

    more

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
In Stock Ships same business day.
Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Choose options to add to cart
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Increase Rear Wheel Horsepower and Torque
    • Includes Long Tube Headers w/ Matching Off-Road X-Pipe
    • 304 Stainless Steel Construction
    • For Off-Road, Track Use
    • Free Flowing Mandrel-Bent Tubing
    • Fits 2011-2014 Shelby GT500 Mustangs
    Improve Horsepower And Torque. The Kooks Long Tube Header and Off-road Shorty X-pipe combo kit for the Shelby GT500 Mustang will balance out the exhaust pressure to increase flow over the restrictive factory exhaust system resulting in more horsepower, torque, and better throttle response.

    Quality Construction. Manufactured from 1-3/4" mandrel bent 304 stainless steel tubing Kooks Long Tube Headers are TIG welded for strength, and feature a leak-free ball flange design to fit perfectly into the included 3" diameter 304 stainless steel Shorty X-pipe for excellent exhaust flow and performance.

    Natural Finish. These Kooks Headers feature a natural stainless steel finish, which provides an aggressive appearance to your engine bay. This is not a heat-resistant coating, AmericanMuscle recommends the use of Exhaust Heat Wrap for high performance applications.

    Recommended Upgrade. To realize the full power potential that this Kooks Long Tube Header and X-pipe Kit has to offer, AmericanMuscle recommends a Bama custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

    Application. This Kooks Long Tube Header and matching off-road shorty X-pipe combo kit is designed specifically for the 2011 to 2014 Shelby GT500 Mustangs.

    Technical notes. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

    Fitment: 2011 2012 2013 2014 Details

    What's in the Box
    • (1) Driver side header
    • (1) Passenger side header
    • (2) Gaskets
    • (16) Small bolts
    • (8) Flat washers
    • (4) Long bolts
    • (4) Nuts
    • (1) X-pipe
    • (2) Down pipes
    • (2) Clamps
    Installation Info
    Tech Specs
    Header Specifications
    Header Type: Long Tube Finish : 304 Stainless steel
    Type Mid Pipe Required: Kooks Shorty X Fitment: 2011-2014 Shelby GT500


    Mid Pipe Specifications
    Style Mid Pipe: Shorty "X" Type Headers Required: Kooks Long Tube
    Piping Material: 304 Stainless Steel Piping Size: 3"
    Catalytic Converter: "NO" - For off-road use only Fitment: 2011-2014 Shelby GT500
    Will it fit my Mustang?
    • GT500 - 11, 12, 13, 14

    Customer Photos (2) Submit Your Photo

    View All 2 Photos

    You Might Also Like

    Q & A

    No questions about this product yet.

    Ask the First Question

    More Products You Might Like

    Customer Reviews (3) Write a Review

    Overall Rating 5.0

    out of 5 stars

    Installation Time:Weekend

    • Performance Gain 5 5
    • Fit 4.666667 4.7



    • 5/5

      Installation Time: Weekend

      November 17, 2016

      Loud Shelby

      I wanted to get something that had a extremely deep aggressive tone to the car and I looked at all the other headers and I finally made a decision on these headers and OMG is this loud even with the stock mufflers is so loud and its already 10times faster I plan on getting a tuner for my car but what a difference

      Sean

      Year: 2014 Submodel: GT500

      Helpful (5)

    • 5/5

      Installation Time: Full Day

      May 27, 2013

      GT500 Kooks Headers & Off road X-pipe

      Install took a day. After the install, started the car, and WOWWWWWW!!!!! Sounded soooo much meaner and louder with this setup. LOVE IT!!!

      Wright

      Year: 2011 Submodel: GT500 Chicago, IL, USA

      Helpful (3)

    • 5/5

      June 22, 2017

      Excellent product

      This is the best headers and x-pipe in the market. I had numerous of different ones and this is by far the best. If you're looking for a nice louder sound for your beast this is the product to go to highly recommended

      FranciscoV

      Year: 2012 Submodel: GT500

      Helpful (2)

    Related Mustang Categories