Kooks Headers Longtube Headers & OEM GREEN Catted Mid Pipes

2011–2021 Jeep Grand Cherokee & 2011–2024 Dodge Durango R/T 5.7L VVT HEMI

Part #: 3610H431

Overview

The Kooks 1.875" Longtube Headers paired with OEM GREEN Catted Mid Pipes are engineered specifically for the 2011–2021 Jeep Grand Cherokee and 2011–2024 Dodge Durango R/T equipped with the 5.7L VVT HEMI engine. Designed for enthusiasts seeking to enhance exhaust flow, increase horsepower, and improve throttle response, this complete header and mid-pipe system offers a direct bolt-on upgrade that maintains emissions compliance with the included OEM GREEN catalytic converters.

Kooks Headers and Exhaust has been a leader in high-performance exhaust technology since 1962, with decades of racing heritage and a commitment to quality craftsmanship. This system is ideal for street and light off-road use, delivering a balance of performance gains and reliable operation without sacrificing emissions standards.

Key Features

Built to exacting standards, the Kooks 1.875" Longtube Headers with OEM GREEN Catted Mid Pipes provide numerous benefits:

• Precision mandrel-bent 1.875" tubing for optimal exhaust flow and scavenging
• Handcrafted in the USA by Kooks’ experienced team ensuring superior quality
• Includes OEM GREEN catalytic converters for emissions compliance and reduced environmental impact
• Direct bolt-on fitment with factory-style flanges and hardware for straightforward installation
• Improved horsepower and torque potential through reduced backpressure
• Durable construction designed to withstand high temperatures and harsh conditions
• Compatible with factory exhaust components downstream of the mid pipes
• Designed specifically for the 5.7L VVT HEMI engine in Jeep Grand Cherokee and Dodge Durango R/T models

Construction & Design

Kooks utilizes premium-grade stainless steel tubing for these longtube headers, ensuring excellent corrosion resistance and long-lasting durability. The 1.875" diameter tubing is carefully mandrel bent to maintain smooth bends that maximize exhaust gas velocity and minimize turbulence. The headers feature thick flanges and precision welds to guarantee a leak-free seal and robust structural integrity.

The OEM GREEN catted mid pipes integrate factory-grade catalytic converters that meet emissions standards while complementing the enhanced flow characteristics of the headers. This combination preserves the vehicle’s environmental compliance without compromising performance gains.

Installation & Fitment

This Kooks header and mid-pipe system is designed for a direct bolt-on installation on 2011–2021 Jeep Grand Cherokee and 2011–2024 Dodge Durango R/T models equipped with the 5.7L VVT HEMI engine. No cutting or welding is required, and the system uses factory mounting points and hardware for a secure fit. Installation typically requires moderate mechanical skills and standard hand tools.

It is recommended to have a professional or experienced technician perform the installation to ensure proper fitment and to avoid potential exhaust leaks. The system is compatible with the factory exhaust downstream of the mid pipes, allowing for seamless integration with stock or aftermarket components.

What's Included

• Set of 1.875" diameter longtube headers, handcrafted by Kooks
• OEM GREEN catted mid pipes with factory catalytic converters
• Necessary gaskets and hardware for installation
• Detailed installation instructions

Ideal For

This Kooks longtube header and mid-pipe system is perfect for Jeep Grand Cherokee and Dodge Durango R/T owners who want to unlock additional power and improve exhaust efficiency without sacrificing emissions compliance. It suits enthusiasts who use their vehicles for spirited street driving, occasional towing, or light off-road adventures and desire a high-quality, American-made performance upgrade.