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Kooks 1-5/8-Inch Long Tube Headers (05-10 GT w/ Manual Transmission)

Item 65506
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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 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.

      Recommended Upgrade. To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle recommends a custom tune with either a Handheld Custom Tuner.

      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.

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


      Fitment: 2005 2006 2007 2008 2009 2010

      Kooks 11312000

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (12)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 12 customers

      Installation Time: Weekend

      Installation Cost: $500-$1000

      • May 12, 2020

        5 2007 GT - Kenh Installation Time: Full Day


        Had the headers installed. They are awesome. Great fit. And sound awesome.

        Helpful (0)
      • January 07, 2020

        5 2008 GT - JUNKYARDGOD Installation Time: Weekend

        Quality Headers

        Quality headers. Make sure you order the collectors at the same time. Install will take some time.

        Helpful (2)
      • February 19, 2019

        5 2008 GT - WillC Installation Time: Shop Install Installation Cost: $250-$500



        Helpful (3)
      • November 17, 2018

        5 2008 GT - Rich

        Awesome product

        Glad I spent the extra money to get these. Perfect fit, no problems with the install, and can’t believe what a difference going from factory manifolds to long tubes make! With the catted X pipe and Roush cat back it sounds great!

        Helpful (7)
      • December 23, 2017

        5 2009 GT - DaleL Installation Time: Shop Install Installation Cost: $500-$1000

        Excellent Product

        Got these as part of the Kooks LT headers\Catted X-pipe combo kit to replace the existing stock exhaust system to increase engine performance and prepare for future SC install. Fit and finish was very good, all fit like a glove. The engine performance improvement was very noticeable, especially on the low end but also thru mid range and up. This got even better when stock tune was modified to account for these headers and a KandN CAI. Had these installed by the local Ford dealership as I don't have the necessary jack stand heights to accommodate their install. Outside of install taking too long due to finding missing parts that were supposed to be included w\ the kit...had to work w\ AM to get all this straightened out...all went good as I had the dealership do other work on my car while waiting on the missing parts to arrive. Love it!

        Helpful (7)
      • September 22, 2017

        5 2007 GT - JoeR007 Installation Time: Weekend

        Sounds like a beast

        Really woke up the car.. Got it with the pipes muffler delete

        Helpful (7)
      • September 21, 2015

        5 2007 GT - Wpm5006 Installation Time: Weekend

        Great sound, involved install

        I purchased the Kooks long tube headers and catted x-pipe along with the Kooks catback exhaust. The setup performs great together. Sound is exactly what I was looking for. Good muscle car rasp but not too loud at idle. The install was a little tougher than I anticipated but was well worth it.

        Helpful (9)
      • August 27, 2015

        5 2006 GT - BananaGT Installation Time: Weekend

        Did the trick.

        I got the Kooks Lts with high flow cats and xpipe. Install can be intimidating but with some determination and time you will get them in. You can really FEEL the car open up in top end, 2 gear is a new animal. Kooks did a great job putting the Lts together. They fit perfectly! The sound is amazing even with my stock mufflers. I would recommend Kooks to anyone.

        Helpful (8)
      • May 29, 2015

        5 2007 GT - Towboater68 Installation Time: Afternoon

        Can't beat quality!!!

        I bought these for my wife's 2007 Foose Stallion. Install was about what you would expect with any modern car on getting to the header bolts but everything fit great with no hang ups. The look on my wife's face when we cranked it up made it worth the extra money you spend for a top brand like Kook's. The sound is absolutely amazing! When driving she gets more looks and even some thumbs up at red lights. We couldn't be happier with Kook's and American Muscle!

        Helpful (7)
      • January 21, 2015

        5 2006 GT - lynny29 Installation Time: Weekend

        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 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...

        Helpful (8)

      Questions & Answers (12 answers)

      5 Top Rated Questions

      Can I keep my existing mid pipes and exhaust with these? 07 Shelby Gt R2300 super charged

      Hey Am! 1 You guys and gals are amazing! And 2 I'm interested in these tubes but I'd like to jus keep my Performance mufflers and performance x pipe exhaust..? Possible? 07 Supercharged Shelby Gt Working my way up 500

      Hi I was wondering if these headers will work with Long Tube Headers x pipe with high flow cats?

      • When it comes to long tubes, we can only guarantee fitment with the same-brand mid pipe specifically designed for the long tube headers. Kooks offers one at item #65504

      Helpful (0)

      What is the physical difference with these kooks headers vs the automatic kooks headers? Seen here:

      • One set of headers is designed specifically for the automatic transmission while the other is designed for manual transmission equipped Mustangs. This is most likely due to fitment issues.

      Helpful (0)

      Will these headers fit on a 5.0 coyote?

      • They are not compatible with the 5.0 Coyote platform, they are only intended for the 2005-2010 4.6L GT and Bullitt models with a manual transmission.

      Helpful (0)
      Post Your Question
      7 More Questions
      Is it recommended to use a mini starter in place of a stock starter for clearance/heat tolerance reasons when installing long tube headers? 1 answer
      Will these headers fit on 5.2l voodoo heads? 1 answer
      I have these kooks long tubes with catted kooks xpipe, want to switch to kooks off road h pipe. Do you guys sell a o/r h-pipe to go with these headers? 1 answer
      Does these headers work with kooks green catted h-pipe offered on your site? About to pull the trigger on it but don't want to make a mistake when paying almost two grand on headers. 1 answer
      Will I still need the kooks mid pipe if I plan to use the MAC off-road pro chamber mid pipe? 1 answer
      Will these work with the Ford racing CNC ported heads. 1 answer
      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! 2 answers

      Installation & What's in the Box

      Installation Info

      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
      • O2 Extensions

      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

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