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Kooks 1-5/8 in. Long Tube Headers w/ Off-Road X-Pipe (05-10 GT w/ Automatic Transmission)

AmericanMuscle no longer carries the Kooks 1-5/8 in. Long Tube Headers w/ Off-Road X-Pipe (05-10 GT w/ Automatic Transmission). Please check out 2010-2014 Mustang Exhaust Combos for an updated selection.

Features & Details

  • Increase Rear Wheel Horsepower and Torque
  • Includes Headers w/ Matching Off-Road X-Pipe
  • 304 Stainless Steel Construction
  • For Off-Road, Track Use
  • Free Flowing Mandrel-Bent Tubing
  • Fits 2005-2010 Automatic GT Mustangs
Improve Horsepower And Torque. The Kooks Long Tube Header and Off-road Shorty X-pipe combo kit for the automatic 2005 to 2010 GT Mustangs 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 1-5/8" 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 2.5" diameter 304 stainless steel Shorty X-pipe for excellent exhaust flow and performance.

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

Application. This Kooks Header and matching Off-road X-pipe combo kit is designed specifically for the 2005 to 2010 4.6L GT Mustangs equipped with an automatic transmission.

Technical Note: This Kooks product is intended for off road use, and is not legal for use in emission restrictive states.

Fitment: 2005 2006 2007 2008 2009 2010 Details



CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
Hardware included:
  • Kooks Long Tube Headers
  • Matching Kooks X-Pipe
  • Necessary Gaskets
  • O2 Extensions
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Finish : 304 Stainless steel
Type Mid Pipe Required: Kooks Shorty X Fitment: 2005-2010 GT - Automatic

Mid Pipe Specifications
Style Mid Pipe: Shorty "X" Type Headers Required: Kooks Long Tube
Piping Material: 304 Stainless Steel Piping Size: 2.5"
Catalytic Converter: "NO" - For off-road use only Fitment: 2005-2010 GT - Automatic
Will it fit my Mustang?

    Customer Photos (4) Submit Your Photo

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      Questions & Answers (2)

      2 Top Rated Questions

      Will the kooks headers and exhaust listed here fit my stock 2006 Mustang GT with V8 automatic? Thank you in advance.

      • Yes, the headers and off-road x-pipe featured in this kit will fit your 2006 GT Automatic Mustang, as they will fit all 05-10 GT Automatic Mustangs!

      Helpful (0)

      will Pypes Black Pype-Bomb Axle-Back Exhaust work with it?

      • The Kooks Header and X-Pipe kit is designed to hook up to an OEM style Cat Back Exhaust system.

      Helpful (0)
      Post Your Question

        Customer Reviews (4) Write a Review

        Overall Rating 5

        out of 5 stars

        Installation Time:Weekend

        Installation Cost:$250-$500

        • Loudness / Volume 4.5 4.5
        • Exhaust Note 5 5
        • Fit & Finish 5 5
        • Bang For Your Buck 4.5 4.5

        • 5/5

          February 13, 2017

          Buy American

          Thanks Kooks. Great American product. Fit is perfect. Craftsmanship is great. These are the best and worth it.


          Year: 2006 Submodel: GT

          Helpful (11)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $250-$500

          April 02, 2016


          I had these kooks headers installed and they made a great difference. I noticed a great difference in power and also exhaust note after they were installed. I also purchased the matching x-pipe to go along with the headers.


          Year: 2010 Submodel: GT

          Helpful (11)

        • 5/5

          Installation Time: Full Day

          January 27, 2012

          the best combo

          Its the best exaust cobmo for 2010 GT , I recomnd this produt


          Year: 2010 Submodel: GT

          Helpful (9)

        • 5/5

          Installation Time: Full Day

          August 27, 2011

          Extremely Pleased With Purchase!

          I just had my Kooks Headers put in and I have to say that this should of been one of the first Mods. My 2010 GT sounds like a muscle machine coming down the street. My Torque went up about about 21+ but my HP stayed the same. I was a little confused on why my HP was the same. But When I got home and loaded the BAMA TUNE I know for fact I gained some more HP and even more TQ right away. I want to re dyno it with the BAMA. Go with BAMA people! Thanks again AM.COM for providing the best service!


          Year: 2010 Submodel: GT Florida

          Helpful (17)

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