Kooks Headers O2 Extension Harness

2019–2020 Ram 1500 Big Horn, Laramie, Laramie Longhorn, Limited, Lone Star, Rebel, Special Service, Tradesman

CAS-109264

Overview:

The Kooks Headers O2 Extension Harness is a precision-engineered accessory designed specifically for 2019 to 2020 Ram 1500 models. This 12-inch extension harness with a 4-pin flat connector ensures seamless connectivity for oxygen sensors when installing Kooks headers or replacing damaged or lost extensions. Crafted to maintain optimal sensor performance, it supports accurate air-fuel mixture readings essential for engine efficiency and emissions control.

Ideal for enthusiasts and professional installers alike, this extension harness is a reliable replacement part that complements Kooks’ high-performance exhaust systems. It helps maintain the integrity of your vehicle’s oxygen sensor wiring during header upgrades or repairs, ensuring consistent sensor operation and preventing potential check engine lights caused by wiring issues.

Key Features:

The Kooks Headers O2 Extension Harness offers essential features that guarantee compatibility and durability for your Ram 1500’s oxygen sensor system:

• 12-inch length provides ample reach for oxygen sensor wiring during header installation
• 4-pin flat connector designed for direct fit with factory and Kooks oxygen sensors
• Included in Kooks header kits where extensions are necessary
• High-quality wiring and connectors ensure reliable electrical connections
• Designed to withstand heat and vibration typical of exhaust system environments
• Direct replacement for damaged or lost oxygen sensor extension harnesses
• Maintains factory sensor signal integrity for accurate engine management
• Handcrafted in the USA by Kooks Headers, a leader in performance exhaust technology

Construction & Design:

Kooks Headers manufactures this O2 extension harness with premium materials engineered to endure the demanding conditions of high-performance exhaust systems. The wiring is insulated with heat-resistant materials to protect against extreme temperatures near the headers. The connectors feature a secure locking design to prevent disconnection from vibration or movement during vehicle operation.

Every harness is handcrafted in the USA, reflecting Kooks’ commitment to quality and durability. The precise engineering ensures a perfect fit with Kooks headers and factory oxygen sensors, minimizing installation challenges and ensuring long-term reliability.

Installation & Fitment:

This extension harness is designed for straightforward installation on 2019–2020 Ram 1500 models including Big Horn, Laramie, Laramie Longhorn, Limited, Lone Star, Rebel, Special Service, and Tradesman trims. It is typically included in Kooks header kits when an extension is required to reach the oxygen sensors.

Installation involves connecting the extension harness inline with the factory oxygen sensor wiring and the sensor itself, providing additional length without splicing or modifying factory components. This plug-and-play design simplifies the upgrade or replacement process, making it accessible for both professional installers and experienced enthusiasts.

What’s Included

• One (1) 12-inch O2 Extension Harness with 4-pin flat connectors

Ideal For:

This O2 extension harness is ideal for Ram 1500 owners upgrading to Kooks headers or replacing damaged oxygen sensor wiring. It is perfect for street performance enthusiasts, racers, and off-roaders who demand reliable sensor connectivity and want to maintain optimal engine performance and emissions compliance.

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.