Kooks 1 7/8 x 3in Street Header Ford Mustang Shelby GT500 5.4/5.8L 2011-2014

Exhaust Headers

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Part #: 11422400

Kooks products are 100 Percent Manufactured in the USA and are made with the highest quality materials. Kooks Headers and Exhaust make the most power in the industry, specifically designed for best fitment, performance, and optimal sound. Kooks products are made of 304 Grade Stainless Steel and come with a limited lifetime warranty. Every Kooks product is dyno tested and race proven. Kooks is 3 generations of being family owned and operated.

  • Stainless Steel Headers
  • For 2011-2014 Ford Shelby GT500 5.4L/5.8L
  • Includes One Pair 12 Inch O2 Extension Harness
  • 1 7/8 Inch x 3 Inch Long tube headers
  • 18 Gauge
  • Downswept
  • Pair


Any returns for an exchange or refund will be allowed within 30 days from the receipt of your order and must be authorized prior to shipping with an RMA Number (Return Merchandise Authorization). To receive your return instructions and RMA# please use our online form under Returns and Exchanges! Once you receive your return instructions please ship out the item at your earliest convenience and provide the tracking number to your customer service rep. The customer will be responsible for all shipping fees. Before shipping your product back please make sure you package it up exactly how you received it and in all of its original packaging. All items must be in brand new and resalable condition. Once the item is received it will be inspected and a credit will be issued accordingly. All returns are subject to a 15% restocking fee. Any returns received without an RMA# will be charged a restocking fee and any shipping fees associated with the return. An item that does not ship directly from IIR's warehouse is considered a "special order" item and no returns will be authorized.

Kooks 1 7/8 x 3in Street Header Ford Mustang Shelby GT500 5.4/5.8L 2011-2014
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