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Kooks 1-5/8-Inch Long Tube Headers with Catted X-Pipe (05-10 GT)

Item 398847
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Market Price $1,735.99 You Save 12% ($199.98)
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$1,536.01 (pair)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Improved Exhaust Flow for More Power
      • Big-Throated, Racy Tone
      • Long-Tube Headers
      • Catted Connection Pipe
      • 5” Off-Road X-Pipe
      • 1-5/8” Inlet Header and 2.5” Collector
      • Free-Flow Mandrel-Bent Tubing
      • T304 Natural-Finish Stainless-Steel Construction
      • Only for Off-Road Use
      • Not CARB Compliant
      • Tuning Recommended With Installation
      • Fits all 2005-2010 Ford Mustang GT Models


      Improved Torque and Horsepower at the Rear Wheels. The Kooks 1-5/8” Headers and Catted X-Pipe Combo removes traditional restrictive factory cats and replaces them with high-flowing race cats and big-bore tubing to help your Mustang breathe better, which produces instant power gains and provides a basis for future power tuning. The header inlet ports are hand ground by experts at Kooks to guarantee a perfect fit.

      Big Throaty Sound. Big-bore piping in the Kooks Headers coupled with race cats in the X-Pipe work with the engine’s firing pulses to harness extra power. They generate a raspy, racy exhaust sound that builds to a jaw-dropping rumble.

      High-Power Race Cats. The Catted X-Pipe features super-flow race cats specially designed to minimize restrictions. They don’t choke your Mustang’s breathing like factory cats.

      Handcrafted Aircraft-Grade Stainless-Steel. Kooks Long Pipe Headers are handcrafted from tough T304 stainless steel. Smooth-radius mandrel-bent curves and hand-ground inlet ports get rid of any obstructions to maximize exhaust flow.

      Tune Recommended. The Kooks Headers and Catted X-Pipe help your engine breathe much more freely. Tuning of the ECU is recommended to maximize the power gains.

      Not CARB Certified. These Kooks Headers are not CARB certified and do not conform to California emissions regulations. They are intended for off-road use only.

      Application. This Kooks 1-5/8” Headers and Catted X-Pipe Combo fits all 2005 to 2010 Mustang GT models.

      Fitment: 2005 2006 2007 2008 2009 2010 Details

      Kooks 1131H020

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Kooks Header
      • (1) Kooks X-Pipe
      • Installation Hardware Including O2 Extensions and Gaskets

      Tech Specs


      Customer Reviews (57)

        Reviews of Kooks Exhaust products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Bullitt - 08, 09
          • GT - 05, 06, 07, 08, 09, 10

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