2011-12 Ford Mustang 5.4L Kooks Headers & Catalytic X-Pipe Kit GT-500 - S197 by Kooks Headers for Mustang Headers

Mustang Kooks Headers & Catalytic X-Pipe Kit (11-12) 5.4L

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Mustang Kooks Headers & Catalytic X-Pipe Kit (11-12) 5.4L

Increase horsepower & exhaust sound with 11-12 Mustang Shelby GT500 Kooks headers & catalytic x-pipe kit.

Item #KOK-60272011CAT

Everyday Low Price: $1,584.24

Ships by Monday, April 13

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  • Increased Horsepower & Torque
  • Improved Exhaust Flow


  • Mandrel Bent Stainless Steel
  • Tig Welded Construction
  • 1 3/4" Primaries
  • Laser Cut Flanges
  • Includes Catalytic X-Pipe
  • Fits 5.4L 4V With Manual Transmission

What's in the Box

  • (2) Stainless Long Tube Headers
  • (1) Catalytic X-Pipe
  • (1) O2 Extension Harness
  • (1) Pair Of Header Gaskets
  • All Needed Hardware
  • Installation Instruction

Made in the USA

Product Description

Get more horsepower from your 2011-2012 Shelby GT 500 with a set of Kooks Headers and catalytic X-pipe. These Kooks long tube headers for your 2011-12 Shelby GT500 features 304 stainless steel tubing, 1 3/4" primaries, and 3" collectors with O2 bungs welded in. Kooks builds all of their products to the highest standard, and these are quite possibly the best long tube headers you can buy for your 5.4L 4V GT500! This kit also includes a Kooks 3" crossover x-pipe which is designed to connect your new Kooks long tube headers to your factory exhaust. This all 304 stainless crossover includes high flow catalytic converters along with all clamps and gaskets needed for installation!

What Sets Kooks Apart?
- Kooks is known for building the best high end consumer headers in the world. This header is constructed with the below high end features!
- Tig welded with all 304 (aircraft grade) mandrel bent stainless steel construction
- Integrated venturi merge spike for better savaging and less collector turbulence
- Primaries blended into the flange for better flow
- Leak Proof Ball Flange collector for trouble free ownership.
- Each primary tube is one continuous piece of tubing. Some competitors weld several pieces of tubing to create one primary, which is a weaker design.

Quite simply...there is not a better header on the market!

2011-12 Mustang Shelby GT500 5.4L 4V

Product Videos

Mustang Headers: Shorty Vs Long-Tube - Which Is Best For You?

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!


Community Q&A

Product Reviews

Vehicle Applications

Ford Mustang - 2011 (11) - 2012 (12)

About This Brand

Kooks Headers for Mustang Headers
Kooks Headers for Mustang Headers - Get Kookin with Kooks
Kooks Custom headers has been making quality custom headers since 1962. Kooks Headers is a family owned and operated company which has prided itself on making the highest, most horsepower production header and exhaust systems for your Mustang & SVT Lightning. From drag to circle track, road racing, motorcycle, and even offshore boats, Kook’s Headers has helped set records and win races. Some of the biggest and most dominant names in NHRA, ADRL, IHRA, NMCA, NMRA, NASCAR, SCCA, and NASA and continue to run Kook’s headers and win championships.

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