Customer Reviews (22) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

• Loudness / Volume 4.571429 4.6
• Exhaust Note 4.809524 4.8
• Fit & Finish 4.666667 4.7
• Bang For Your Buck 4.714286 4.7

• 5/5

  Installation Time: Full Day

  May 21, 2018

  Looks exhaust

  Sounds great and received exceptional power gains.

  JohnH

  Year: 2006 Submodel: GT

  Helpful (0) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 4

    4
• 4/5

  Installation Time: Shop Install

  Installation Cost: $250-$500

  April 18, 2018

  Now sounds like a beast

  I read enough to not try the install myself since I don't have a lift. So I had a shop install them. I was really surprised at how much louder my car was vs. stock. I have put headers on a few cars I've owned and these made the biggest difference in sound by far. I really wasn't going for the loud, but it's not too bad as long as you aren't into the throttle too much. I had put on a supercharger a year or so ago and wanted the headers so things could breath better. I did run into an issue that isn't completely resolved yet. The clearance on the driver side cat is very minimal. When I first picked up the car after the install, the cat was hitting on the driver side both on the floorboard and the O2 sensor was hitting the transmission mount. After some wrestling and minor grinding by the shop, the driver side cat clears the floorboard (barely) and the O2 sensor no longer hits. But after the exhaust heats up after 20 minutes or more of driving, the driver side cat hits the floorboard occasionally when accelerating causing a bunch of noise. I may need to take it to an exhaust shop to tweak a bend to give me some clearance? Overall, I'm very happy with them. Although I need to get the clearance issue resolved.

  jslacy

  Year: 2008 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 4

    4

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 4/5

  Installation Time: Weekend

  April 09, 2018

  Long tubes

  Great ad on for my Roush mustang, installation was completed with 4 tall jack stands I did not have to remove the motor mounts or k member. I did throw out the supplied mounting bolts for a good set of headlock locking header bolts. Also a good selection of hand tools will make install a lot easier..

  BentRod

  Year: 2008 Submodel: GT

  Helpful (1) Thanks for your input!

  • Loudness (Volume) 3

    3

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Weekend

  September 10, 2017

  Sounds like a beast

  I got this combo with the Pypes muffler delete and it sounds loud and raspy just like i wanted.

  JoeR007

  Year: 2007 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Shop Install

  Installation Cost: $250-$500

  September 02, 2017

  MUST BUY!!!!

  I had these to go with my Flow Master Outlaw Axle backs and I must tell you it is amazing! I cant get over the feel and sound! It is expensive, but extremely worth it!

  Mickie

  Year: 2005 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  June 21, 2017

  high class long tube headers

  fits perfect, but need some little 4- 5 final ajustement. sound was really perfect with my bullitt stock muffler.

  HugoB

  Year: 2008 Submodel: Bullitt

  Helpful (1) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 4

    4
• 5/5

  Installation Time: Full Day

  June 14, 2017

  Great product

  After many hours of research on multiple headers and mid-pipes, I finally decided to go with Kooks. I was a little weary of buying the Kooks as they are the most expensive out of any others, however, the quality of the material, as well as the quality of the sound, simply cannot be beaten. Getting these headers to fit onto the engine was a bit of a pain. The lower header bolts become very hard to get to when the new headers are put on. If you find yourself purchasing this great product, I would HIGHLY recommend removing the K-member as it will allow you to get your hands directly underneath the headers instead of having to go from the side like I did. It took my father and I around 9 hours from start to finish while using a lift. Nontheless, these headers are amazing and give you an amazing sound that is sure to turn heads going down the road.

  DrakeP

  Year: 2009 Submodel: GT

  Helpful (2) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  March 17, 2017

  Can't go wrong with kooks

  Purchased these for my 08 GT and the sound is phenomenal. Such a night and day difference between stock manifold. My mechanic said they were the best fitment and quality headers he has installed ever. The x-pipe does give a very raspy tone so if you don't like that type of tone I would say get the headers and go for the kooks h-pipe instead. Overall great product and I am very satisfied.

  mitchjb98

  Year: 2008 Submodel: GT

  Helpful (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  January 22, 2017

  Amazing Quality

  I like many others have done hours upon hours of research for the best headers for my pony. Everyone is gonna have their own opinion and mine now more than ever is Kooks. The quality of the welds and stainless steel tubing are superior to some other brands that I have seen. The moment I started my pony up you could just hear her singing with joy. The x-pipes have a bit of raspy tone to it and the overall noise isn't too loud making it just enough to wake your neighbors at 5am but not enough to put you on any police radars. These are a little on the pricey side but you get what you pay for.

  Ziggy

  Year: 2007 Submodel: GT

  Helpful (5) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 4

    4
• 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 (3) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (2) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (2) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 4

    4

  • Fit & Finish 4

    4

  • Bang for your Buck 4

    4
• 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 (4) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 4

    4

  • Bang for your Buck 5

    5
• 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 (3) Thanks for your input!

  • Loudness (Volume) 4

    4

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (5) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (3) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 5

    5

  • Bang for your Buck 5

    5
• 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 (13) Thanks for your input!

  • Loudness (Volume) 5

    5

  • Exhaust Note 5

    5

  • Fit & Finish 3

    3

  • Bang for your Buck 4

    4