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Kooks header and green catted X-pipe kit for 2011–2014 Ford Mustang Shelby GT500 matches 1-3/4 x 3 headers with a green catted X-pipe to open exhaust flow and sharpen throttle response. Offered as a vehicle-specific upgrade, the system applies Kooks' race-proven designs to deliver better midrange power and improved exhaust scavenging.
Kooks 11-14 Ford Mustang Shelby GT500 1-3/4 x 3 Header & Green Catted X-Pipe Kit
