Kooks Headers Cat-Back Exhaust System

2007–2018 Jeep Wrangler JK, 2005–2010 Jeep Grand Cherokee LS Engine Swap

37104100

Overview:

The Kooks Headers 3-inch Stainless Steel Cat-Back Exhaust is engineered specifically for Jeep Wrangler JK models from 2007 to 2018 and select 2005 to 2010 Jeep Grand Cherokee vehicles equipped with an LS engine swap. Designed to complement Kooks Headers and Y-Pipe setups, this exhaust system delivers enhanced exhaust flow, improved power output, and a distinctive aggressive sound tailored for street, race, and off-road enthusiasts. Crafted for those who demand high performance and durability, this cat-back exhaust is ideal for Jeep owners upgrading to LS powertrains seeking a reliable and powerful exhaust solution.

Backed by over 50 years of racing heritage and innovation, Kooks Headers and Exhaust continues to lead the industry with products that combine precision engineering and handcrafted quality. This cat-back system is a perfect match for LS-swapped Jeep Wranglers, providing a robust exhaust path that maximizes engine efficiency and performance.

Key Features:

This 3-inch stainless steel cat-back exhaust system offers a range of features designed to optimize your LS-swapped Jeep’s performance and sound:

• 3-inch mandrel-bent tubing constructed from 16 gauge 304 stainless steel for superior strength and corrosion resistance
• Oval muffler measuring 4" x 9" x 14" for balanced sound attenuation and performance
• Designed specifically to be used with Kooks Headers and Y-Pipe for seamless integration
• Engineered for LS engine swaps using RPM Extreme or similar LS swap kits
• Recommended minimum 2-1/2 inch suspension lift to ensure proper fitment and clearance
• Handcrafted in the USA with meticulous attention to detail and quality control
• Dyno and race tested to ensure maximum power gains and durability
• Limited lifetime warranty to the original purchaser, reflecting confidence in product longevity
• Compatible with a wide range of Jeep Wrangler JK trims including Rubicon, Sahara, Sport, Unlimited, and more

Construction & Design:

The Kooks cat-back exhaust system is built from premium 304 aircraft-quality stainless steel, known for its excellent resistance to rust and corrosion even under harsh off-road conditions. The 16 gauge tubing is mandrel bent to maintain consistent diameter throughout bends, ensuring unrestricted exhaust flow and minimizing turbulence. The oval muffler is designed to provide a perfect balance between sound suppression and performance, delivering a deep, aggressive exhaust note without excessive drone.

Every component is handcrafted in the USA by skilled technicians, continuing Kooks’ legacy of precision manufacturing and family-owned craftsmanship. This attention to detail guarantees a system that not only performs but also fits precisely with minimal modifications when paired with the recommended headers and Y-pipe.

Performance & Sound

When combined with Kooks Headers and Y-Pipe, this cat-back exhaust system significantly improves exhaust scavenging, reducing backpressure and enhancing engine breathing. This results in increased horsepower and torque across the RPM range, especially beneficial for LS-swapped Jeep Wranglers tackling both on-road and off-road challenges. The exhaust note is aggressive yet refined, providing a powerful growl that complements the LS engine’s character without overwhelming cabin comfort.

Installation & Fitment:

This cat-back exhaust is designed specifically for Jeep Wrangler JK models from 2007 to 2018 and select 2005 to 2010 Jeep Grand Cherokee vehicles equipped with an LS engine swap. It must be used in conjunction with Kooks Headers and Y-Pipe for proper fitment and optimal performance. A minimum 2-1/2 inch suspension lift is recommended to ensure adequate clearance and avoid interference with suspension components.

Due to the custom nature of LS swaps and varying vehicle configurations, additional modifications or parts may be required for a perfect fit. It is strongly advised to consult with Kooks Headers and Exhaust before ordering to confirm compatibility and installation requirements.

What's Included:

• 3-inch stainless steel cat-back exhaust system
• 3-inch mandrel bent 16 gauge 304 stainless steel tubing
• 3-inch oval muffler (4" x 9" x 14")
• Hardware and clamps for installation

Ideal For:

This exhaust system is ideal for Jeep Wrangler JK owners who have performed or plan to perform an LS engine swap and want to maximize power, sound, and durability. It is perfect for off-road enthusiasts, street performance drivers, and racers who demand a high-quality exhaust system that complements their LS powertrain and enhances overall vehicle performance.

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.