Kooks Headers Longtube Headers & OEM Catted Mid Pipes

2006–2010 Jeep Grand Cherokee SRT8 6.1L

Part #: 3400H420

Overview

The Kooks Stainless Steel Longtube Headers and OEM Catted Mid Pipes are precision-engineered exhaust components designed exclusively for the 2006 to 2010 Jeep Grand Cherokee SRT8 equipped with the 6.1L V8 engine. This high-performance exhaust upgrade replaces the restrictive factory manifolds and mid pipes to significantly improve exhaust flow, resulting in enhanced horsepower, torque, and throttle response.

Crafted for enthusiasts who demand both street and track-ready performance, these headers and connection pipes deliver a perfect balance of power gains and aggressive exhaust tone without sacrificing emissions compliance. Whether you’re tackling spirited street driving, track days, or off-road adventures, this system offers a durable and reliable solution to unlock your SRT8’s full potential.

Key Features

Engineered to optimize exhaust scavenging and reduce backpressure, the Kooks longtube headers and catted mid pipes provide measurable performance improvements. Key features include:

• 1-7/8 inch primary tubes paired with 3 inch collectors for superior exhaust flow
• 3 inch OEM outlet catted stainless steel mid pipes for seamless integration and emissions compliance
• Constructed from premium T304 aircraft-quality stainless steel for exceptional corrosion resistance and durability
• Handcrafted in the USA by experienced Kooks craftsmen ensuring precise fitment and quality
• Dyno and race tested to guarantee maximum power output and reliability
• Direct bolt-on installation with no major modifications required
• Limited lifetime warranty to the original purchaser for peace of mind
• Designed specifically for the Jeep Grand Cherokee SRT8 6.1L (2006–2010)

Construction & Design

Kooks utilizes premium T304 stainless steel, known for its outstanding strength and resistance to rust and corrosion, ensuring long-lasting durability even under extreme heat and harsh conditions. The longtube header design enhances exhaust gas velocity and scavenging, which helps unlock additional horsepower and torque from the 6.1L V8 engine.

Each header is mandrel-bent to maintain smooth airflow and precision-welded to preserve structural integrity and exact fitment. The catted mid pipes feature a 3 inch diameter with OEM-style outlets, allowing for a clean transition to the rest of the exhaust system while maintaining emissions compliance. Every component is handcrafted in the USA, reflecting Kooks’ commitment to quality and performance.

Performance & Sound

Replacing the factory manifolds and mid pipes with Kooks longtube headers and catted connection pipes dramatically improves exhaust flow, resulting in enhanced throttle response and increased power output. The system also produces a deeper, more aggressive exhaust note that complements the muscular character of the Jeep Grand Cherokee SRT8 without excessive drone, delivering an exhilarating driving experience.

Installation & Fitment

These headers and mid pipes are engineered for direct bolt-on installation on 2006–2010 Jeep Grand Cherokee SRT8 models equipped with the 6.1L engine. Installation requires standard hand tools and moderate mechanical experience. No cutting or major modifications are necessary, making this a straightforward upgrade for enthusiasts seeking improved performance and sound.

What's Included

• 1-7/8 inch x 3 inch stainless steel longtube headers (driver and passenger side)
• 3 inch x 3 inch OEM outlet catted stainless steel mid pipes
• All necessary gaskets and hardware for installation
• Limited lifetime warranty documentation

Ideal For

This Kooks header and connection pipe system is ideal for Jeep Grand Cherokee SRT8 owners who want a high-quality, durable exhaust upgrade that enhances power, sound, and overall driving enjoyment. Perfect for street performance, track use, and off-road excursions, these components provide a reliable and performance-focused solution tailored to the 6.1L V8 engine.