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Kooks Long Tube Headers 1-7/8 in. (11-14 GT)

16 Reviews
Our Price

$1,081.41

  • Item #65511
  • MPN# 11412400

  • Market Price $1,201.56
  • You Save 10% ($120.15)
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Product Videos Customer Photos
Features
  • Increases RWHP and Torque
  • Long Tube Header Design
  • Free Flowing 1-7/8" Mandrel-Bent Tubing
  • 304 Stainless Steel Construction
  • TIG Welded for Strength
  • Fits 2011-2014 GT Mustangs
Description
More Horsepower and Torque. A set of Kooks Long Tube Headers will greatly improve the performance of your 5.0L Coyote Mustang. Kooks Headers feature an integrated venturi style collector that increases exhaust scavenging, and reduces turbulence to improve your 5.0'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 1-7/8" 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.

Recommended Upgrade. To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle recommends a 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 2011-2014 5.0L GT Mustangs. 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.

Fitment: 2011 2012 2013 2014 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
Tech Specs
Header Specifications
Header Type: Long Tube Finish : Natural
Type Mid Pipe Required: Shorty Fitment: 2011-2014 5.0 GT Mustangs
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • GT - 11, 12, 13, 14

Most Helpful Reviews

5/5
Kooks !

Great product ! Really recommend kooks. Added great power to the mustang, sounds great when paired up with other kooks x pipe and cat back exhaust.

Helpful (1)

4/5
getting better

before I bought this product I was thinking how make perfect sound to my 2013 gt one of my friends told me to get the KooKs Long Tube 1.7/8 and I was so happy when I saw the result : 1- perfect and loud ...

Read More
Helpful (1)

Overall Rating 4.7 out of 5 stars
Read All 16 Reviews

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6 Questions / 8 Answers

Ask a Question

Fitment Are these the ones to use with the Kooks Catted Shorty H-Pipe (12-13 Boss)

Ben94

  • That is the way to roll, keep it all the same you will get the best out of the overall sound and performance

    Miltons

    Good Answer (0) (0)

Show 2 more answers Question Resolved

catted or off road i have been asking my self for a long time now if i should go catted or offroad x-pipe. what would you guys recommend and why. i really want my car to be as loud as possible but i dont want any trouble with my car because im not running cats.

Pepe27

  • If you want it to be as loud as possible then go with the off road x pipe... The cats tame it down a little bit so not having them will make it louder, also if you have a custom tune you will not have any problems with out the cats you will actually pick up even more power not having them, the only down fall is if you have a state inspection you most likely will fail due to not having the cats otherwise no problem, it will simply be loud and powerful.

    Kyle2013

    Good Answer (2) (1)

Show 2 more answers Question Resolved

How does the weight compare to stock? I have seen several other headers that weight their setup vs stock. So I guess the question is, How much does the header/mid pipe combo weight? And how much does the stock combo weight?

drewk85

  • Long tube headers and mid pipe i would says at lease 40lbs difference

    Leblanc

    Good Answer (1) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

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Customer Reviews (16) Write a Review

Overall Rating 4.7

out of 5 stars




  • 5/5

    June 09, 2016

    Kooks !

    Great product ! Really recommend kooks. Added great power to the mustang, sounds great when paired up with other kooks x pipe and cat back exhaust.

    Ed

    Year: 2013 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    February 01, 2016

    getting better

    before I bought this product I was thinking how make perfect sound to my 2013 gt one of my friends told me to get the KooKs Long Tube 1.7/8 and I was so happy when I saw the result : 1- perfect and loud sound. 2- A little of power.

    alex

    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Mobile,AL

    Helpful (1) (0)

  • 5/5

    April 23, 2011

    Long Tube Headers

    These headers have great fitment. Quality is second to none. At the lowest point of the header barely hangs lower than the floor pan (for those that are lowered a little or a lot. Great power increase

    Daniel A.

    Year: 2011 Model: GT Driving Style: Street / Strip

    Helpful (19) (7)

  • 4/5

    Installation Time: Weekend

    August 17, 2012

    Awesome sound

    I put these on my 13 Boss along with the H-pipe and removed the baffles and the car sounds mean, very mean. Only beef with them is they are a pain to install. Had stock parts out in 4 hours took another 20 to install the headers! Had to remove both motor mount brackets and lift the engine up quite a bit to sneak them in. Also the stock studs and nuts need to be removed before installing the headers and be sure to check the thread pitch of your bolts as the set comes with two different bolts. The gaskets leave a lot to be desired. I reused the stockers since I had 400 miles on them :D.

    Hotrod93

    Year: 2013 Model: Boss Driving Style: Street / Strip 'Stangs I have owned: 2 North Carolina

    Helpful (8) (2)

  • 5/5

    Installation Time: Weekend

    March 23, 2013

    Sounds great, Serious gains, Tough Install

    After doing a ton of research I finally decided on the kooks 1-7/8 long tubes along with a O/R X pipe. Right out of the box headers looked incredible. Definitely made the right choice going with kooks. Like always American Muscle comes through with a speedy delivery. Started the install on a wednesday night, finished saturday afternoon. A rough total of 25 hours. Did it in my garage with a floor jack and jack stands. I would not recommend doing this with out a lift. All angles were next to impossible to get to even with all the right tools. Plus laying on your back for 3 days straight isn't the best feeling. All in all the headers fit pretty well. Had to wrestle the drivers side in a little bit but with some time got it into place. The car sounds incredible on the first start. It really changed the sound of just my Roush axel backs. I would absolutely recommend this to anyone looking to do long tubes. Have not gotten it on a dyno yet but expecting some pretty decent gains. Only other thing I want to mention is o2 sensor fitment. A lot of people were saying you need extension harnesses or longer sensors. Its not true. My stock sensors reached without a problem. Front and rear. It just took a little work. Great product. Overall a good fit and some serious performance gains. These headers will definitely turn some heads.

    Max1210

    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 New Jersey, USA

    Helpful (4) (0)

  • 5/5

    Installation Time: Full Day

    March 24, 2016

    Kooks 1-7/8

    One of the best quality headers on the market! Install isn't for the faint of heart took about 4-5 hours for total install with access to a lift. Car sounds like a completely different animal now! Highly recommend these headers in 1-7/8 if you plan on going boosted in the future.

    Dakota

    Year: 2012 Model: Boss Driving Style: Street / Strip 'Stangs I have owned: 3

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    December 17, 2015

    If you want high quality, these are the Headers you want.

    I got these for my 2011 Coyote because I had an end goal in mind, high horsepower boosted application. That being said I opted for the 1 7/8 headers because these cars flow so much more then previous years. Install on these is so straight forward and can be done with simple hand tools. Granted I had a lift to my disposal, I can't see why this would be any harder on jack stands in a garage. My car Dyno'd at 373hp/347tq in stock form. With just the Kooks 1 7/8, Catless mid pipe, and catbacks, the car has made an astounding 441hp/418tq. If you're looking for a quality set of headers, that will both look great, never tarnish, perform with high expectations, and just simply cause no head-ache install wise. These are the headers for you.

    Dita

    Year: 2011 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 3 Phoenixville, PA

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    March 22, 2013

    Incredible Product

    Kooks did a fantastic job with these products. Installed these headers on a lift help from an Infiniti enthusiast with a heavily modified G35 and he was blown away by the quality as was I. The sound with the high flow catted X pipe and my Magnaflow Competition catback will wake the dead. My setup sounds like a race car. You can really feel the power all the way through the ENTIRE power band, no drop off with a good tune anywhere (thank you Bama!). It is a rough install though. Took about 6 hours from start to finish. Read the instructions, too. You may think you know what you're doing but you'll thank yourself later. For those who want the best, I highly recommend them all the way.

    nsastang87xx

    Year: 2011 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Milwaukee, WI

    Helpful (1) (1)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    February 22, 2013

    HP Gain vs stock

    If you want to upgrade from stock, don't bother with anything else. You can feel the HP gain thru the RPM range. Can't be happier with the preformance. Had them shopped installed. They complained that it was a tuff job. The next guy will pay more to have them installed by my shop. So I'm happy I didn't try to install them myself. They are a very tight fit. Specially on the passenger side. Had to remove a bolt that fastens the air conditioning line cause it was hitting the passenger side headers and wire tied it to another line, It cost the same to shop install short headers or long headers. So don't bother with shorties. You'll be disappointed with the HP gain and you'll only save a few buck. Expensive upgrade, but with the X pipes and a tune, the car feels way more powerful. Finally, the exhaust growl puts a smile on my face.

    Bob89

    Year: 2013 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 West Chester, PA, USA

    Helpful (1) (1)

  • 5/5

    Installation Time: Full Day

    October 22, 2015

    Great sound

    My mustang is 2014 istall the long tube headers ( kooks) w/xpipe off road and stype catback The sound is awosome but its a biit loud Overall headers is perfect fit with perfect sound Now waiting for the jlt intake w/bama x4

    AnasAdel

    Year: 2014 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Saudi Arabia

    Helpful (0) (1)

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