Kooks Headers 1142H430 1-7/8" Long Tube Header and GREEN Catted X-Pipe Kit 2011-2014 Shelby GT500

The Kooks Headers 1142H430 is a complete header and connection kit engineered specifically for 2011-2014 Ford Shelby GT500 models equipped with 5.4L or 5.8L 4V engines. This comprehensive system combines premium stainless steel long tube headers with an EPA-certified GREEN catted X-pipe to deliver maximum performance while maintaining emissions compliance.

Complete Kit Includes:

• 1-7/8" x 3" stainless steel long tube headers with mandrel-bent primaries
• 3" x 2-3/4" (OEM connection) GREEN catted X-pipe
• All necessary gaskets, hardware, and oxygen sensor extension harnesses

Header Construction Features:

• Premium T304 stainless steel construction throughout
• 3/8" thick laser-cut flanges for superior sealing and durability
• Oval port design matched to factory specifications
• 1-7/8" mandrel-bent primary tubes flowing to 3" collectors
• Ball and socket style collectors for easy installation
• Includes EGR fitting for proper engine management
• Stock bolt pattern for direct fitment

GREEN Catalytic Converter Technology:

• EPA-certified high-flow catalytic converters for 50-state street legality
• 400 CPSI metallic substrate for maximum flow with emissions compliance
• Enhanced precious metal coating for high-temperature durability
• Designed to minimize check engine light concerns
• Compatible with forced induction applications

Performance Benefits:

• Significant horsepower and torque gains over factory exhaust
• Improved exhaust scavenging for better engine breathing
• Aggressive exhaust tone while maintaining refined sound quality
• Optimized X-pipe design for balanced exhaust flow

This is a direct bolt-in system requiring no cutting or welding. All components are handcrafted in the USA and backed by Kooks' limited lifetime warranty to the original purchaser. Every Kooks system is dyno-tested to ensure maximum performance gains.