Kooks Headers 3in SS Green Catted Y-Pipe: Jeep Wrangler (07-18) w/ LS Engine Swap

Kooks Headers Stainless Steel Green Catted Y-Pipe

2007–2018 Jeep Wrangler JK 4-Door with LS Engine Swap

37103300

Overview:

The Kooks Headers 3-inch Stainless Steel Green Catted Y-Pipe is a precision-engineered exhaust component designed specifically for Jeep Wrangler JK 4-door models from 2007 to 2018 equipped with LS engine swaps. Crafted to complement Kooks Headers and Cat-Back Exhaust systems, this Y-pipe enhances exhaust flow while maintaining emissions compliance through its high-flow catalytic converters. Ideal for enthusiasts seeking to maximize power and efficiency in their LS-swapped Jeep Wranglers, this Y-pipe delivers a perfect balance of performance and durability for street, race, and off-road applications.

Built with the same commitment to quality that has made Kooks Headers a leader in high-performance exhaust systems for over 50 years, this Y-pipe is a critical component for those upgrading their exhaust setup to achieve optimal power gains and reliable operation.

Key Features:

Designed with precision and performance in mind, the Kooks Stainless Steel Green Catted Y-Pipe offers the following key features:

• Constructed from 304 aircraft-quality stainless steel for superior corrosion resistance and longevity
• 3-inch mandrel-bent 16-gauge tubing ensures smooth exhaust flow and minimal restriction
• Equipped with Kooks GREENcats 300-cell high-flow catalytic converters for improved emissions control without sacrificing performance
• Torca swivel seal style connection on the inlet for a secure, leak-free fit
• Specifically designed to be used with Kooks Headers Part #37102200 or #37102400
• Compatible with Kooks Cat-Back Exhaust Part #37104100 for a complete exhaust upgrade
• Engineered for LS engine swaps using RPM Extreme or similar LS swap kits
• Recommended minimum 2-1/2 inch suspension lift for proper clearance
• Custom fitment may require additional modifications or parts, especially for 2-door Wrangler models

Construction & Design:

This Y-pipe is handcrafted in the USA using premium 304 stainless steel, known for its exceptional strength and resistance to rust and heat. The 3-inch mandrel-bent tubing maintains consistent diameter throughout bends, reducing turbulence and backpressure to optimize exhaust scavenging. The integration of Kooks GREENcats 300-cell catalytic converters balances high flow with emissions compliance, making it suitable for street-legal applications where applicable.

The Torca swivel seal connection enhances installation precision and durability by providing a tight, vibration-resistant seal at the inlet. Every component is dyno-tested and race-proven to ensure it meets Kooks’ rigorous standards for performance and reliability.

Installation & Fitment:

This Y-pipe is engineered exclusively for Jeep Wrangler JK 4-door models from 2007 to 2018 with LS engine swaps. It must be paired with Kooks Headers (Part #37102200 or #37102400) and is designed to connect seamlessly to Kooks Cat-Back Exhaust systems (Part #37104100). Installation requires a minimum 2-1/2 inch suspension lift to provide adequate clearance.

For 2-door Wrangler models, fuel tank relocation may be necessary due to space constraints. Because this is a custom application part, additional modifications or components might be required for proper fitment. It is recommended to consult with Kooks Headers and Exhaust prior to ordering to ensure compatibility with your specific build.

What's Included:

• 3-inch Stainless Steel Green Catted Y-Pipe
• Kooks GREENcats 300-cell high-flow catalytic converters integrated
• Torca swivel seal style inlet connection

Ideal For:

This Y-pipe is perfect for Jeep Wrangler JK owners who have performed or plan to perform an LS engine swap and want to maximize exhaust efficiency and power output. It suits enthusiasts focused on street performance, off-road capability, and track use who require a durable, high-quality exhaust component that integrates seamlessly with Kooks Headers and Cat-Back systems.

Additionally, it is ideal for those seeking a handcrafted, American-made exhaust solution backed by decades of racing heritage and engineering expertise.