USE COUPON CODE "SUMMER26"
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:
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:
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.
Kooks Headers & Exhaust is a heritage performance exhaust manufacturer best known for high-quality stainless steel headers and complete exhaust systems. Built for serious street and track builds, Kooks products focus on fitment, durability, and the kind of airflow improvements enthusiasts chase when stepping up power.
ETA stands for Estimated Time of Arrival. The date shown is calculated using our Available-to-Promise (ATP) system, which tracks real-time supplier commitments to determine when a product is expected to be available for delivery. Specifically, the date is calculated by adding 9 business days from the date a supplier has committed to ship the product, representing a worst-case scenario for when we can expect to receive inventory.
Please note: The ETA is an estimate, not a guarantee. While we work closely with our suppliers to keep dates as accurate as possible, delays due to shipping carriers, weather, customs, or supplier-side issues may occasionally push the actual arrival beyond the date shown. Likewise, inventory may arrive sooner than the ETA in many cases. If you would like to be notified for when this item arrives, sign up for our back in stock notifications!
37103300 Kooks Headers 07-18 Jeep Wrangler / 05-10 Jeep Grand Cherokee 3in Stainless Steel Green Catted Y-Pipe. This high-performance Y-pipe is crafted from durable 304 stainless steel with mandrel-bent 3-inch tubing for optimal exhaust flow. Featuring Kooks' GREEN Cats 300 cell high-flow catalytic converters, it ensures excellent emissions control without sacrificing power. Designed specifically for LS engine swaps, it pairs perfectly with Kooks headers and cat-back systems. The Torca swivel seal connection guarantees a secure fit, while the handcrafted USA construction promises lasting quality and performance for street, race, and off-road use.
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MADE IN THE USA
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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:
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:
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.
Kooks Headers & Exhaust is a heritage performance exhaust manufacturer best known for high-quality stainless steel headers and complete exhaust systems. Built for serious street and track builds, Kooks products focus on fitment, durability, and the kind of airflow improvements enthusiasts chase when stepping up power.
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
