(approx) a Day
Mechanical expertise or professional installation required.
Features, Description, Reviews, Q&A, Specs & Installation
Fitment: 2011 2012 2013 2014 Details
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February 24, 2020
Great sound and torque.
I have the boss intake so I lost some low in torque and these headers really helped out. Sound is great . It’s a lot deeper tone. The car really breathes nowHelpful (1)
October 30, 2018
Better than stock. Has a smoother throttle response with a bottom end boost. Exhaust sounds smoother and lower but was told it would get louder over time. My setup is borla s type with basani catted x pipe and 85 millimeter bbk throttle body. I also have k@n 69 typhoon cai with bama tune. My 2 w6v3 12s powered by slash amp makes the commute even nicer. 2014 gt premium with 6000 miles. I drive truck otr so car isn't driven much.Helpful (5)
June 20, 2018
Good power , Great Sound
Great fit. Good quality. Can feel the extra power mid range to redline. Sounds bada$$.Helpful (4)
May 23, 2018
Definitely worth it
Install took 9 hours with lift and Jack Stands, pretty straight foward and fitment is perfect. Dropping the K member is not required at all. As for power you can feel the torque and horsepower increase in the low end. Thats what i was goinf for since i have the Boss 302 Manifold and as for sound it gives it a smooth toned sound which is just perfect.Helpful (11)
May 04, 2018
Shorties ... vs Long tube
After a lot of research I went with the Kooks shorties ... and having to listen to everyone tell me that they were useless and to only buy long tubes. Well all my research never showed that long tubes gave a huge amount back. The shorties worked wonders on my car ... I love the grunt they give down low and mid range ... and up top they are phenomenal. I am really happy at how they worked out.Helpful (12)
August 16, 2017
Kooks to Boss
Patience is a virtue. Fit was good and not a job to hurry on. Must be very careful with aluminum heads. Tightening sequence must be repeated 4 or 5 times to evenly spread supplied gasket and to insure it is tight. When complete all fitment was good. Also suggest cleaning out interior pipes on headers as there was much steel filings in them.Helpful (10)
August 15, 2017
Kooks shorty headers and torque
Have road raced with longbtube headers and X pipe for 2 years. Went to these shortys and an H pipe to increase torque and reduce weight. Dropped 13 lbs over prior set up and picked up 21 ft lbs of torque after tuning. No loss of HP. Added benefit is that the exhaust system is now even with frame rails instead of below.Helpful (16)
October 30, 2016
Headers look great and sound great. I have a 66 convertible with a coyote in it.Helpful (12)
July 24, 2015
Well after a full weekend I got my car back with these headers, from what I was told.. this wasn't an easy install. Alot can be done with 1 person, but will require 2 people at some point. However perfect fitment, the supplied gaskets seemed a little on the cheap side but they had to be used. The headers have very good quality, and exhaust flow. Sound overall the exhaust note is deeper, swifter and just has an unique sound. My car breathes so good now sounds like a turbo is under the hood! When on throttle, the response is very better, and you can feel the car pulling harder but smoother. I have the Roush Axle backs and they toned down the rasp, but is still loud with way better tone. At WOT the car still screams so no worry there. Only recommendation is to go back and tighten the head bolts, usually new bolts will back out a little bit with vibration.. but you'll be able to tighten up, up top.Helpful (9)
March 09, 2014
I installed these in my garage with rear wheels on ramps and the front on jack stands. I won't lie, this job was hard! It took about 3 days but it was really worth it. I definitely recommend dropping the K-member as it will make the starter and all the header bolts easy to access except the front passenger side stud. Like another customer mentioned get an e8 torx socket and removing the studs will be easy. My 2013 GT with 22000 miles has been thru 2 winters here in Germany so my exhaust is pretty rusted. I snapped one of the catalytic converter studs so be prepared to knock the studs out and replace them if this happens to you. I also recommend replacing your stock motor mounts if you are going to do this job since you will either have the k-member out or engine raised either way. After the first start up I knew I made a great choice. I thought my Roush axlebacks sounded great before, but now they are a little louder and much deeper! I can definitely feel the seat of the pants hp/tq gain from these headers!Helpful (9)
Will these fit up with pypes off road h pipe with the cat delete option and if so do I need a custom tune. will I lose torque and gain hp or vice versa?
These headers will work with that mid-pipe and a tune is highly recommended. As far as the gains you will see all around gains.
Will these fit on my stock cats? I have a borla atak catback system! thanks
The Kooks 1-7/8 in. Super Street Shorty Headers will work with your stock mid pipe and catalytic converters.
Are these headers tune required and will they fit my car? I have jba off road h pipe
A tune is highly recommended with the Kooks Super Street Shorty Headers. These headers are designed to bolt up to the factory H-Pipe. It may not be a direct bolt on with the JBA mid-pipe.
I have a coyote swap truck, if these headers don't fit, can I return them hassle free? I've had coyote swap headers and none seem to fit in the longtube world and neither will stock gt manifolds. These look cleaner in regards to fabrication.
As these are not intended to be used on models other than Mustangs listed, if they are not in brand new condition they cannot be returned.
are these equal length primarys, I was also looking at Magnaflow 1-3/4 in. Ceramic Shorty Headers and they look more like equal length primarys
The Kooks 1-7/8 in. Super Street Shorty Headers do not have equal length primary tubing.
Unfortunately, these headers are designed to be a bolt-on install with the factory mid pipe and will not be a direct bolt-on installationwith the Pypes x-pipe.
The Kooks 1-7/8 in. Super Street Shorty Headers will not carry a CARB EO number, making these unable to pass in states that have adopted California Emissions. The BBK 1-3/4 in. Tuned Length Shorty Headers do carry the CARB EO number necessary to pass California emissions. The BBK headers will have a smaller diameter primary tube, making these slightly more restrictive on a higher horsepower car like yours with the 2.9 Whipple, when compared to the larger Kooks primaries.
If you are going to use the Kooks 1-7/8 in. Super Street Shorty Headers I would recommend some kind of forced induction. (Nitrous, supercharger, etc.) if not there will be a smaller power gain due to less back pressure.
This will indeed install up to the stock cats and anything else designed to work with stock headers.
The Kooks Super Street Shorty Headers will only install to stock length X and H pipes, but can use any brand. these will not work with X and H pipes for long tubes.
These Kooks Super Street Shorty Headers will certainly fit the the stock mid-pipe on your Boss.
Hey Jesus This should bolt on to your ford racing pipe without a problem. With Shorty headers you get a little more wiggle room in terms of mid pipe fitment than you would with long tubes.
Hey Jesus, Sound is some what relative when it comes to exhausts. One mans loud is another's perfect and so forth. What is true is that the x-pipe will make any system gain a throatier sound, with the kooks more free flowing manifolds it should amplify that very noticeably.
Hi, These shorty headers are designed to bolt straight up in the stock location and use the stock Mid-Pipe and can be used with a most cat-backs.
(approx) a Day
Mechanical expertise or professional installation required.
What's in the Box
|Header Type:||Shorty||Finish :||Natural|
|Type Mid Pipe Required:||Standard Length||Fitment:||2011-2014 5.0 GT & BOSS Mustangs|