Kooks Headers 1141H430 1-7/8in. Long Tube Header & Green Catted X-Pipe Connection Kit

The Kooks 1141H430 is a complete long tube header and catted connection kit designed for the 2011–2014 Ford Mustang GT 5.0L 4V. This performance exhaust upgrade pairs 1-7/8" x 3" stainless steel long tube headers with a 3" x 2-3/4" GREEN Catted X-Pipe that connects directly to the factory OEM exhaust system, delivering a significant improvement in exhaust flow, horsepower, and torque over the restrictive stock manifolds.

Kooks GREEN Cats are EPA-verified high-flow catalytic converters engineered specifically for modern muscle car applications. Unlike standard cats, the GREEN Cat technology is rated to perform reliably in vehicles producing up to 750 rear-wheel horsepower, making this kit equally at home on a bolt-on street build or a more aggressive forced-induction setup.

Kit Includes:

• 1-7/8" x 3" T304 aircraft-quality stainless steel long tube headers
• 3" x 2-3/4" (OEM) GREEN catted stainless steel X-pipe connection
• O2 sensor extensions
• Gaskets and all required installation hardware

Key Features:

• T304 aircraft-grade stainless steel construction for superior durability and corrosion resistance
• GREEN Catted X-Pipe — EPA-verified high-flow catalytic converters rated up to 750 RWHP
• Dyno and race tested design engineered for maximum power output
• OEM X-pipe connection for seamless integration with factory rear exhaust sections
• Handcrafted in the USA by a family-owned company with over 60 years of racing heritage
• Backed by a limited lifetime warranty to the original purchaser

Kooks Headers and Exhaust has been a leader in the high-performance exhaust industry since 1962, with championship wins and records set across the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA, and many other sanctioning bodies. All Kooks products are proudly handcrafted in the USA.