Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017

Kooks: 1151H420
MSRP: $1,903.41
CJ's Low Price:
1508630400 57172
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Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017
Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017 Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017 Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017 Play Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017 Video 1

Product Description

Kooks 1-7/8" Stainless Steel Long Tube Headers with a 3" Catted Mid-Pipe for all 2015, 2016 and 2017 GT Mustangs.

Unleash the full potential of your 2015-2017 Mustang's 5.0L Coyote engine with the best long tube headers on the market. Kooks long tube headers are made from aircraft quality T304 stainless steel. Kooks only uses the highest quality stainless steel unlike their competitors. 1-7/8" tuned primaries merge into 3" collectors to create the smoothest flowing path. Every collector features Kooks' scavenging spike to ensure maximum flow. Laser cut 3/8" thick flanges ensure no warping or bending occurs. Each port is hand ground to make sure they are perfectly smooth so there is no exhaust constriction. Kooks systems are truly bolt-on and never require any cutting or welding. O2 extensions, bolt-in high flow catted mid-pipe, and all necessary hardware are included for an OEM-like fit and finish.

A set of headers is the perfect next step if you’ve already outfitted your Mustang with first-level bolt-on upgrades such as a cold-air intake, throttle body and cat back exhaust system. These Kooks long tube headers offer maximum performance in a package that won’t keep you from passing smog thanks to the integrated high-flow catalytic converters present on both sides of the system.

Smooth Exhaust, Maximum Power

Headers lower back pressure by allowing exhaust gasses to expand out of your car’s combustion chamber into higher-volume tubing than what comes stock on your Mustang. Kooks headers feature an equal-length design that not only produces the most power, but encourages the smooth exhaust flow that results in a rich, sonorous sound from your Mustang. Because OEM connections are used, you can be sure the fit and fitment of these Kooks long tube headers won’t ruin the clean lines of your Mustang.

Features and Benefits:
- Full Stainless Steel Construction
- Includes Bolt-In Mid-Pipe
- High-Flow Catalytic Converters
- Retains OEM Connections
- CNC Mandrel Bent tubing
- 1-7/8” Primaries into 3” Collectors
- Scavenger Spikes ensure Maximum Flow
- Significant Horsepower Gains over Factory Manifolds
- Made in the USA

Tech Tip: This system is designed specifically to utilize the factory 2-1/2" connection point. This connection point is used by most aftermarket cat-back exhaust systems on the market. If you are looking to maintain a full 3" diameter from the collectors to your cat-back system, you will need a custom adapter pipe (NOT Included).

Each Kooks exhaust system is designed specifically for the engine and vehicle it is built for. Kooks utilizes the firing order of the engine when designing their exhaust tubes. The most technically advanced equipment is used when designing Kooks exhaust systems. Every system is dyno and race tested to ensure the results are up to Kooks' expectations. This means Kooks can guarantee their exhaust makes the most horsepower and torque in the industry. All Kooks products are manufactured in a 45,000 square foot state of the art facility located in Statesville, North Carolina.

You can feel good about your investment, too, because Kooks racing background allows them to test these headers on cars that see actual track time. That means that professionals have made the effort to put a car with these headers installed on a dynamometer (a device used to measure horsepower) and run through the gears. The result is headers that are tuned to not only make more peak horsepower, but deliver usable gains throughout the rev range. This practice also ensures that you’re not sacrificing horsepower at some parts of the rev range just to make it back on the top end.

Tune Required, Not Included

You might be curious to know why a tune is required to use these Kooks headers with your Mustang. The difference in exhaust behavior compared to your Mustang’s stock system is significant enough that recalibrating your car’s onboard computer is necessary to realize the full performance gain. The upside of tuning your car for use with the Kooks headers is that you’ll be able to tune for your specific setup. Whereas most out-of-the-box tunes assume that a car is stock, recalibrating your car with a custom tune will allow you to get the cumulative performance gain afforded from the addition of your new headers and other upgrades like exhaust and intake.

Please Note: These Headers are NOT intended for use with Right Hand Drive Applications.

With these headers having 3/8" laser cut flanges, welded oxygen sensor bungs, scavenging spikes in the 3" collectors, ball and socket style connection, and a full stainless steel construction. You’ll be impressed not only by the quality but the performance gains you will receive. Order the Kooks 1-7/8" Stainless Steel Long Tube Headers with a 3" Catted Mid-Pipe for 2015-2017 Mustang GTs from CJ Pony Parts.

Of course, just like everything that we sell here at CJ Pony Parts, these headers will ship out to you the very same day as long as we receive your order during business hours (earlier than 5pm Eastern time, Monday-Friday). You don’t have to worry about the cost of shipping large pieces either. So what are you waiting for? Pick up a new set of Kooks headers for your ‘Stang today!

Similar Mustang Parts

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Installation Instructions

Mustang Installation

Mustang Applications

This product will fit the following Mustang years:

Product Reviews

Write a review
Kooks Long Tube Headers 1-7/8" With Catted Mid-Pipe 3" Stainless Steel GT 2015-2017 is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Great headers! Extremely well made. Perfect fit with beautiful welds. They sound awesome!
Date published: 2015-03-02
Rated 5 out of 5 by from great performance excellent buy, amazing sound. Your o2 sensors might be too short so either swap driver for passenger or order a longer set.
Date published: 2016-07-31
Rated 5 out of 5 by from Sounds Awesome I have the Borla Ford Racing Catback setup with the Kooks LT headers and it sounds awesome! Loud but not annoyingly loud, really kicks it up over 3k RPM. The set is pricey, but worth the money for the quality.
Date published: 2016-01-27
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Product Questions

I have a 2017 gt premium. Will these headers void my factory warranty?

Asked by: BigOx83
Unless the product in question is directly responsible for an issue, your warranty should remain intact. Read up on the Magnuson-Moss Warranty Act for more details.
Answered by: CJPP Dave
Date published: 2017-10-13

Are they California CARB legal?

Asked by: Cessnapilot
We do not list them as being C.A.R.B. legal, We don't keep track of the aftermarket part laws in any area, so we'd encourage you to check the list of official approved CARB parts here: http://www.arb.ca.gov/msprog/aftermkt/devices/amquery.php.
Answered by: rk cjpp
Date published: 2017-08-24

Are these a direct bolt-on for my 2015 premium Mustang GT with track pack. I have the Roush phase 2 supercharger and Ford Racing Borla cat-back exhaust. Do you have or know of anyone who has a tune for this set-up. How much time to install? Thanks.

Asked by: Icon
Yes, they will be a direct bolt-on with that cat-back system. We offer the Lund Racing nGauge and their tunes, we can definitely set you up with a great tune if you pick one up. Time to install will vary with the tools and knowledge you have. Some people have knocked out long tube header installs on these cars in 3-4 hours, others around 6-8 hours.
Answered by: CJPP Dave
Date published: 2017-05-12

Will these headers reduce the ground clearance of the car?

Asked by: kgb13
Ground clearance should not be affected.
Answered by: CJPP Dave
Date published: 2017-05-11

Will going from a 3 inch long tube header into s 2.5 inch step down back into a 3 inch catback cause a choke point? What would correct this? Thanks

Asked by: MagneticStang16
This does not cause any issues. The only solution would be to have a custom section made that replaces where it necks down to 2.5". What I can tell you is that there is 1000hp cars that have exhaust setups that go from 3" to 2.5" and back to 3" without any problems.
Answered by: CJPP Dave
Date published: 2017-01-04

Will these headers work with an 3in Corsa sport catback with 3in X-pipe with no extra parts?  

Asked by: MagneticStang16
These headers will work with any cat-back system that utilizes the factory connection point, the Corsa Sport Cat-Back that you speak of is one example.
Answered by: CJPP Dave
Date published: 2016-12-20

If I already have a costume tune for long tube headers and put a throttle body and CAI on my mustang will I still need another tune for that as well?

Asked by: mustangaddict
You may want to ask your tuner.
Answered by: Kooks Headers
Date published: 2016-12-07

does the kooks long tube headers that come with high flow cats. r the cats ceramic? i am told i cant use ceramic cats with my blower.

Asked by: bufords 2015
No, the cats are metallic.
Answered by: CJPP Dave
Date published: 2016-12-02
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