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Kooks Header and Catted X-pipe Combo - Manual (05-10 GT)

Market Price $1,687.71 You Save 18% ($297.08)

$1,390.63

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  • Item 65500
  • MPN#11313200

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Features & Details

  • Increase Rear Wheel Horsepower and Torque
  • Includes Headers w/ Matching Catted X-Pipe
  • 304 Stainless Steel Construction
  • High Flow Catalytic Converters
  • Free Flowing Mandrel-Bent Tubing
  • Fits 2005-2010 Manual GT Mustangs
Improve Horsepower And Torque. The Kooks Long Tube Header and Catted Shorty X-pipe combo kit for the manual 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 catted X-pipe combo kit is designed specifically for the 2005 to 2010 4.6L GT and Bullitt Mustangs equipped with a manual transmission. Includes gaskets and 02 extensions.

Fitment: 2005 2006 2007 2008 2009 2010 Details

What's in the Box
Hardware included:
  • Headers
  • Mid Pipe
  • Gaskets
  • 02 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 - Manual


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: "Yes" Fitment: 2005-2010 GT - Manual
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10

Most Helpful Reviews

5/5
05 Saleen NOVI 2200

Had local shop install these and netted additional 52 RWHP and 36 ft lb Torque. This was also with the addition of Steeda Charge motion delete plates. 502 RWHP and 457 torque. Clutch slipped at 6K RPM ...

Read More
Helpful (1)

5/5
Bigfoot

This header kit is absolutely the best item I have installed yet on my 2007 Shelby GT to date. The install took me a weekend to complete, but only because I don't have a lift. I bought the Flowmaster Outlaw ...

Read More
Helpful (1)

Overall Rating 5 out of 5 stars
Read All 13 Reviews

Customer Photos (5) Submit Your Photo

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6 Questions / 11 Answers

Ask a Question

Will these connect to stock cat back? I have to purchase my upgrades in stages. So If I purchased these I would have a while before I could get the cat back exhaust. Can these connect to the stock cat back exhaust?

bossman302

  • Unfortunately the stock cats are placed too high up for long tubes to be connected properly, so if your going for long tubes you will need replacement cats, or you can run without cats depending on your states emission laws, the general misconception is that factory cat converters slow the flow of exhaust, which is completely untrue. High flow cats and stock flow the exact same, but because of emission laws your technically not allowed to remove the converters from their factory position unless they are fouled or defective. But if you go with this set up you will have converters in place and it will still pass a five gas analyzer, so if I was you I would go with this setup to still pass emissions inspection and still keep the hard power down to the wheels, I'm on a limited budget also.

    Geoff31

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

If I install these will my car still pass deq

Jjjones

  • yes i will pass as long as its catted but see if you can get it threw before you install

    firebird79

    Good Answer (0) (0)

Show 2 more answers Question Resolved

will i need to retune my computer when installing these

delrosso95

  • You could run these without tuning but you would probably loose HP because of lean fuel conditions at WOT. Any good tuner will allow you to make corrections or buy tunes for different mods. These headers are great and with a cold air intake and more fuel your HP will go way up, run cooler and more efficient.

    Igore

    Good Answer (4) (1)

Show 2 more answers Question Resolved

ehaust will the kooks header and catted x-pipe combo manual set up hook to my flowmaster ehaust. Also do i have to use that serten type of tunner or can i use any tunner.

RD22

  • Yeah, they will fit! You can use every tuner you want.

    Ge87

    Good Answer (0) (0)

Show 2 more answers Question Resolved

Did the dyno image in the picture include a tune? Does the image of the dyno run in your product images include a BAMA tune or any other parts? Or was it otherwise bone-stock?

Donnie37

  • The image of the Dyno run provided with the Kooks Header and Catted X-pipe Combo - Manual (05-10 GT) is accurate based on a stock Mustang with no custom tunes or other modification.

    JeffAM

    Good Answer (0) (0)

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With the cats in place, is this setup 50 state legal or only 49 state legal?

Animal

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Customer Reviews (13) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Loudness / Volume 4.583333 4.6
  • Exhaust Note 4.75 4.8
  • Fit & Finish 4.666667 4.7
  • Bang For Your Buck 4.75 4.8



  • 5/5

    May 20, 2016

    05 Saleen NOVI 2200

    Had local shop install these and netted additional 52 RWHP and 36 ft lb Torque. This was also with the addition of Steeda Charge motion delete plates. 502 RWHP and 457 torque. Clutch slipped at 6K RPM so need a upgrade. Made a HUGE difference and could not be happier. 373s were also added.

    Ammotroop

    Year: 2005 Submodel: Other

    Helpful (1) (0)

  • 5/5

    Installation Time: Weekend

    August 14, 2014

    Bigfoot

    This header kit is absolutely the best item I have installed yet on my 2007 Shelby GT to date. The install took me a weekend to complete, but only because I don't have a lift. I bought the Flowmaster Outlaw mufflers a couple years and that sounded great without the headers. Now that I have installed the Kooks headers with X-Pipe kit, and combined with the Flowmaster Outlaw Mufflers the sound is OMG out of this world. Anyone looking to put a set of on their Mustang, I strongly suggest the Kooks header with X-Pipe kit. The sound that is put out, seems nothing short of a straight pipe exhaust system. This item gets a 10+ from me. Thanks American Muscle.

    Bigfoot4000

    Year: 2007 Submodel: GT Southern California

    Helpful (1) (0)

  • 5/5

    April 17, 2011

    KOOKS HEADERS COMBO

    I LOVE THE KOOKS HEADERS CATED PIPE COMBO SOUNDS GREAT IN EVERY GEAR, AND THIRD CRYES HARDER. THEY WERE A PAIN TO INSTALL, A LIFT WOULD MAKE IT EASIER TO INSTALL BUT TOTALLY WORTH IT!!!!

    FERNANDO

    Year: 2006 Submodel: GT

    Helpful (10) (2)

  • 5/5

    Installation Time: Weekend

    November 13, 2011

    Passenger side header hits frame.

    Passenger side header tube hits the frame rail when you make hard left hand turns.

    0neQwkStang

    Year: 2006 Submodel: Other Ontario Canada

    Helpful (6) (2)

  • 5/5

    Installation Time: Afternoon

    September 27, 2011

    Great product

    installation was about 6.5 hours with all the tools needed, included lift. Great quality, not too loud. A totally different kind of sound.

    Ge87

    Year: 2009 Submodel: GT Italy

    Helpful (4) (1)

  • 5/5

    Installation Time: Shop Install

    March 24, 2012

    Kooks Headers

    If your looking for long tube headers this is the way to go. They sound amazing the power gains in the mid to high rpm are amazing. I have this with the fr500 muffler and I love the mix of the too. In my opinion these are a must have if you want a awesome sounding exhaust.

    Razo

    Year: 2008 Submodel: GT

    Helpful (3) (1)

  • 5/5

    Installation Time: Full Day

    November 13, 2013

    Awesome Power / Great Sound

    I love this package. I replaced my shorties with these Kook LTs and I couldnt be happier. Not only is the exhaust note very powerful but the power increase when combined with my CAI, FR TB, FR Intake Manifold, and Bama Tune put me at a dyno-ed 330 HP to the wheels. Good job Kooks.

    JaredMoon

    Year: 2007 Submodel: GT USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    March 23, 2012

    Great Buy!

    These headers are top notch in fit and finish! Took the shop a full day to install and tune the car. It was well worth the wait! The exhaust note coming from the magnaflows deserves to be on a ring tone! Noticeable power gains throughout RPM's. Had the car dynoed after and with some bolt ons and ford racing throttle body I put down 320 RWHP and 330 RWTQ in my 2010 stang! Forced my buddy with a Camaro to go out and put cams and headers on his so he wouldn't get outran! Lol! As usual fast shipping and great customer service from A.M! !! Don't hesitate on buying these because you won't be disappointed!!

    Stallion10

    Year: 2010 Submodel: GT Atlanta, Ga

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    March 02, 2012

    Kooks Header and Catted X-pipe Combo - Manual (05-10 GT)

    The superior fit and finish of the Kooks Headers and the catted X-pipe is AWESOME! It woke up the car!

    LMitchell

    Year: 2006 Submodel: GT Sumter SC

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    July 11, 2015

    More power, great fit, great sound

    I bought this after intake, cam, gears (and other stuff). Fit is great, power increase is wonderful, and the sound is fantastic. Without changing the exhaust your power isn't maximized.

    Wally1681

    Year: 2006 Submodel: GT Minneapolis, MN

    Helpful (0) (1)

  • 5/5

    Installation Time: Full Day

    May 03, 2013

    Worth the Money and Time

    Install: The installation was tough on jack stands, but having never touched an exhaust system before, it was pretty straight forward. It might seem intimidating, but it's just time consuming. The only complaint I have about fitment is that it seemed impossible to get a torque wrench on every header bolt. However, I haven't had a problem with leaking and I've had them on for almost a year now. Just make sure you get them tight, and turn them again after the first drive while they're still warm. Sound: I initially had flowmaster mufflers with these (not sure what model, they were put on by the previous owner). I lived in an apartment complex, and even with Hot Rod cams, the flowmasters kept it quiet. I have since switched to the FR500s axle back and it is much louder, pops on deceleration, and pretty much sounds like an animal. If you are worried about volume, don't be. Even with the FR500s, I can still creep around under 2000 rpm and keep her quiet in the neighborhood. It's the cold starts that really make noise :D Performance: With this exhaust system, the Airaid Race intake and a Bama tune (no Hot Rod cams), I shaved off .95 seconds on my best stock ET with back to back trips to the track. Enough said.

    Josh1

    Year: 2006 Submodel: GT Houston, TX

    Helpful (0) (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 02, 2012

    The product incresed overall performance

    Excellent product, a bit hard to install due to the lack of space LOL. perfect fit, looks great and sounds wicked. american Muscle quick delivery and support is the best!!!!!

    Miltons

    Year: 2010 Submodel: GT Germany

    Helpful (0) (1)

  • 5/5

    Installation Time: Full Day

    July 05, 2013

    The quality of the kooks headers are awesome!

    Yes, the Kooks headers are a bit 'pricey' but you can't beat the quality. Expect to take your time and have patience during the install.

    TomL1

    Year: 2005 Submodel: GT New York

    Helpful (0) (0)

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