Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!". Header and Connection Kit. 2015-2023 Ford Mustang Shelby GT350 5.2L 4V. Includes 1-3/4in. x 1-7/8in. x 3in. Stainless Steel Long Tube Stepped Headers/3in. x 2-3/4in. Catted Stainless X-Pipe.. Header and Connection Kit. 2015-2023 Ford Mustang Shelby GT350 5.2L 4V. Includes 1-3/4" x 1-7/8" x 3" Stainless Steel Long Tube Stepped Headers & 3" x 2-3/4" Catted Stainless X-Pipe.. Kooks 15-21 Ford Mustang Shelby GT350R Shelby GT350 1-3/4 x 1-7/8 x 3 Header & Catted X-Pipe Kit. Kooks Products Are Backed By A Limited Lifetime Warranty To The Original Purchaser. 1-3/4" x 1-7/8" Header and Catted Connection Kit. 2015-2020 Shelby GT350 5.2L 4V. 1-3/4in. x 1-7/8in. Header and Catted Connection Kit. 2015-2020 Shelby GT350 5.2. Kooks Products Are Dyno And Race Tested And Designed For Maximum Power. Kooks Uses T304 Aircraft Quality Stainless Steel. Stainless Header and Connection Kit.. Manufactured In The USA. Header & Conn. Kit. Header/Conn. Kit

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