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Kooks Long Tube Headers - Manual (05-10 GT)

3 Reviews
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  • Item #65506
  • MPN #6022
  • Market Price $955.54
  • You Save 10% ($95.55)
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  • Increases rear wheel horsepower and torque
  • Long Tube header design
  • Free flowing 1-5/8" mandrel-bent tubing
  • 304 stainless steel construction
  • Tig welded for strength
  • Natural finish
  • Fits 2005-2010 Manual GT and Bullitt Mustangs
More Horsepower and Torque. A set of Kooks Long Tube Headers will greatly improve the performance of your modular 4.6L Mustang. Kooks Headers feature an integrated venturi style collector that increases exhaust scavenging, and reduces turbulence to improve your 4.6's exhaust flow over the restrictive stock factory manifolds, boosting your Pony's horsepower and torque numbers. Quality Construction. Kooks Long Tube Exhaust headers are manufactured from 1-5/8" mandrel bent 304 stainless steel tubing for superior airflow. These headers are TIG welded and feature a leak-free ball flange design for optimal performance and a better than OEM fit.

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 these Long Tube Headers have to offer, AmericanMuscle recommends a custom tune with either a SCT SF3 or Diablosport InTune Custom Tuner.

Application. These Kooks Long Tube Headers are designed to fit the 2005-2010 4.6L GT and Bullitt Mustangs equipped with a manual transmission. Kooks long tube headers require the use of a Kooks shorty midpipe in order to be installed properly (see drop down option above).

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

Mustang Fitment: 2005 2006 2007 2008 2009 2010 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
Installation Info

Installation Time: (approx) a Day

Difficulty Level:Mechanical expertise or professional installation required.

Tech Specs
Header Specifications
Header Type: Long Tube Finish : 304 Stainless steel
Type Mid Pipe Required: Kooks Shorty X Fitment: 2005-2010 GT & Bullitt - Manual
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10

Fits manual transmissions only

Most Helpful Reviews View All

Overall Rating 5/5 Write a Review
excellent looking headers

i only gave 3 stars on performance .. i have a whipple 550 kit on my car and i also put kooks off road x pipe... the power gain was noticeable on interstate kicks but not much gain on the bottom end...i

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Helpful (1) (0)


Top 1000 Contributor

super headers

fairly difficult to install even for an experienced mechanic due to tight tolerances but well worth the effort. two thumbs up!!!

Helpful (0) (0)

Customer Photos (3) View All

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Q & A (1 Questions, 2 Answers) Ask a Question

Rookie quesion, what is the difference between a off-road x pipe and a catted x pipe? I have a '06 GT with Borla Stinger cat-backs. Right now I'm in Afghanistan, and i wanna know everything about these headers before i put them on my car, so i know im not wasting my money on something that i have to spend an extra arm and a leg on so that everything fits and works right. I just need a little help on this, so anyone willing to put in their 2 cents, it would be much appreciated!

Rogue4 Year: 2006 Model: GT

Good Question (0) (0)
  • An off road x pipe has no catalytic converter mounted on the exhaust, A standard x pipe most often does. A catalytic converter (Cat) is a emissions control mechanism designed to filter out the bad and toxic chemicals in your exhaust and comes standard on all cars. If you remove the Catalytic converter you will have better and quicker exhaust flow making more horse power. How ever depending on where you live, if you take the catalytic converter off you will most likely fail your smog test if your area requires you to smog test.

    Helpful (2) (0)

    Rockstar69 Year: 2006 Model: GT

    Top 500 Contributor

Show 1 more answer Answer This Question

Reviews (3) Write a Review

  • 5 Stars 1.0 100%
  • 4 Stars 0 0%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%

out of 5 stars

3 Customers Recommend this Product

Installation Time:Weekend

  • Performance Gain: 4.333333 4.3/5
  • Fit: 4.666667 4.7/5
  • Bang For Your Buck: 4 4/5
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  • 5/5

    excellent looking headers

    January 21, 2015

    i only gave 3 stars on performance .. i have a whipple 550 kit on my car and i also put kooks off road x pipe... the power gain was noticeable on interstate kicks but not much gain on the bottom end...i believe a bigger throttle body will help... the fit is perfect and the kooks stuff fits better than factory car has a 1.5 lowering kit and the kooks stuff is not gonna drag..the fit against the bottom of the car is perfect...kooks cost a little more but when you install and see how good of fit and quality they are you will be glad you spent the extra cash... you cant go wrong with kooks products...


    Year: 2006 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Manchester, TN, USA

    Helpful (1) (0)

  • 5/5


    December 23, 2014

    OMG!!! This is the best mod yet, install these with the Flowmaster Outlaws and you have one "ROARING SOUND". I looked a lot of header options and had a hard time deciding which brand to get, I can honestly say these were definitely the right choice. The fit was absolutely perfect, as long as you follow the directions step-by-step. It took an entire weekend to install, mainly because I don't have a lift. I did it with a floor jack and jack stands. If you own a lift it won't take as long to install. The hardest part of the install are some of the bolts are a bit difficult to access, but worth the aggravation once the project is finished. You'll be extremely excited when you turn that key and start the "ROARING" for the first time after completing the install. Awesome job KOOK and American Muscle.


    Year: 2007 Model: GT Driving Style: Show 'Stangs I have owned: 1 Southern California

    Helpful (0) (0)

  • 5/5

    super headers

    December 21, 2013

    fairly difficult to install even for an experienced mechanic due to tight tolerances but well worth the effort. two thumbs up!!!

    Top 1000 Contributor


    Year: 2010 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Middletown, OH, USA

    Helpful (0) (0)

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