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Exhaust› Headers, Manifolds and Components

Kooks Headers

1-7/8" x 3" Long Tube Headers

Name: 1-7/8" x 3" Long Tube Headers
Brand: Kooks Headers
SKU: 11422400

$2,396.00 $1,594.31 Save $801.69

SKU: 11422400

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Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Kooks Headers 11422400 is a set of 1-7/8" x 3" long tube headers designed for the 2011-2014 Ford Shelby GT500.

Constructed from 304 stainless steel, these headers feature 3/8" thick laser-cut flanges, oval ports, and 1-7/8" mandrel-bent primaries. They include an EGR fitting, PY-8034-AL gaskets, CAS-109203 oxygen sensor extension harnesses, and BK111 & BK114 bolt kits.

Show original supplier description

The Kooks Headers 11422400 are 1-7/8" x 3" long tube headers engineered specifically for the 2011-2014 Ford Shelby GT500 models equipped with the 5.4L or 5.8L 4V engine. Constructed from durable 304 stainless steel, these headers feature robust 3/8" thick laser-cut flanges for a precise fit and oval ports. The 1-7/8" mandrel-bent primary tubes are designed to optimize exhaust flow, contributing to improved performance. This kit includes an EGR fitting, PY-8034-AL gaskets, two CAS-109203 oxygen sensor extension harnesses, and the necessary BK111 & BK114 bolt kits for installation. Installation of these long tube headers requires the use of a Kooks X-Pipe or H-Pipe. Additionally, Kooks offers optional Jet-Hot ceramic coatings in various finishes, such as Classic Polish (Silver), Satin Silver, Satin Black, and Flat Black, to enhance durability and heat management. A tumbling service is also available for an additional fee. These headers are built to order in North Carolina, with an estimated ship window of 4-6 weeks. Customers needing the product sooner are advised to contact Kooks or find an authorized dealer with existing inventory.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Kooks Headers
Part Number	11422400
Category	Exhaust

Videos

Kooks Headers Install and Dyno Pull for 2013 Mustang GT

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2006 Shelby GT500 Header Install and Dyno Run

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Ford Mustang 2011-2014 5.0 Headers and Exhaust (before and after)

KOOKS 1-7/8" Long Tube Headers Installed Sounds AGGRESSIVE! *LOUDER

Kooks Headers Mustang GT Install and Dyno Test

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

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