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Kooks Long Tube Headers 1-5/8 in. (96-04 GT)

Market Price $1,270.79 You Save 10% ($127.08)
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  • Item 65526
  • MPN# 11212000

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Features & Details

  • Increases RWHP and Torque
  • Long Tube Header Design with a 2.5 in. Collector
  • Free Flowing 1-5/8" Mandrel-Bent Tubing
  • 304 Stainless Steel Construction
  • TIG Welded for Strength
  • Fits 1996-2004 GT and Bullitt Mustangs
More Horsepower and Torque. A set of Kooks Long Tube Headers will greatly improve the performance of your 4.6L GT or Bullitt 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 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 Bama custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

Application. These Kooks Long Tube Headers are designed to fit the 1996-2004 4.6L GT and Bullitt Mustangs. Kooks long tube headers require the use of a Kooks shorty midpipe in order to be installed properly (see drop down option above). O2 Sensor extensions are included.

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

Fitment: 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) Driver side header
  • (1) Passenger side header
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Finish : Natural
Type Mid Pipe Required: Shorty Fitment: 1996-2004 4.6L GT & Bullitt Mustangs
Will it fit my Mustang?
  • Bullitt - 01
  • GT - 96, 97, 98, 99, 00, 01, 02, 03, 04

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4 Questions / 4 Answers

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I have a 2001 Zinc Yellow Gt and it's on 2" lowering Springs all around, if I install these will they scrape on the floor ? I'm afraid that they will and I might have to go to stock height please let me know! Thank you.


Helpful (0)
  • These Kooks Long Tube Headers do sit lower than the factory headers and mid-pipe, however, you will still have clearance with a 2" drop. Since the exhaust will sit lower, your clearances over bumps, pot holes, etc will be decreased, so if you live in an area where this is common you would have to drive with a little more caution than normal.


i have hooker long tube header, they rotted out need replacement. was wonder if i need to change my mid pipe also when getting kooks?? mine has the 2 bolt flange as the kooks and bbk. which long tube would be best and save me $$$ ? 02 gt 4.6l 5 speed


Helpful (0)
  • The long tube headers should match up to the mid-pipe if it is a 2-bolt flange. Also, between the Kooks and the BBK, my preference would be with the Kooks headers however since you would like to save money, the BBK ceramic long tube headers item #56010 are your best option over Kooks and BBK chrome headers. There is a $100 difference between chrome and ceramic and that is because the chrome headers are more for looks while the ceramic will dissipate heat and will not change color like the chrome will when exposed to heat after long periods of time.


I'm sure with a catted xpipe they will pass emissions, yes or no?


Helpful (0)
  • Regardless if you have a catted X-Pipe in your exhaust setup, if you live in the state of California, the Kooks Long Tube Headers 1-5/8 in. (96-04 GT) unfortunately will not pass as it has CARB restrictions.


Do thee Kooks long tube headers fit automatic mustangs as well?


Helpful (0)
  • Absolutely, just wrap them with exhaust wrap to keep your engine cool and your floor panels.


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Customer Reviews (1) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Weekend

  • Performance Gain 5 5
  • Fit 4 4

  • 5/5

    Installation Time: Weekend

    October 24, 2013

    What a Pain! But Good.

    Ok, the good. These headers arrived very quickly being sent overseas. Three days quick. A new record AM! The look and finish on them is amazing despite the fact that you'll never really see them again once they are on the car. The bad (or very irritating) - The directions that Kooks include with these are very basic. Very basic. Some of the steps they have if you follow make putting them in and tightening the bolts near impossible. Even after a call to Kooks the tech I spoke with said it is better to drop the K-member and use quality sleek tools. Having to "slightly pry" two of the tubes apart to get the steering column in is a joke. Better to disconnect the steering column underneath the steering wheel and slide it through said tubes and reconnect it. And lastly, the o2 extensions didn't even match the o2 sensors at the connection point. There are two tabs that are supposed to help guide it in and they didn't line up. I ended up breaking those tabs off, luckily had a clean break, and they slid right in. Overall, if you're more experienced at doing this work or are going to pay a shop to do it, they are worth the money. But, if you do it yourself, be prepared to deviate from some very poor instructions.


    Year: 2002 Submodel: GT Newmarket, Suffolk CB8, UK

    Helpful (2)

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