Gibson Cat-Back Performance Exhaust

2004–2006 Jeep Wrangler TJ Unlimited 4.0L I6

Part #: 617702

Overview

The Gibson Stainless Steel Cat-Back Single Exhaust system is a precision-engineered upgrade designed specifically for the 2004 to 2006 Jeep Wrangler TJ Unlimited with the 4.0L inline-six engine. This exhaust system enhances your Jeep’s low and mid-range power delivery, improving throttle response and torque from idle up to 3000 RPM—ideal for off-road adventures, trail climbing, and towing. Featuring a single rear exit with a polished stainless steel slash-cut tip, it combines aggressive styling with durable construction to elevate both performance and appearance.

Built for Jeep enthusiasts who demand reliable power and a refined exhaust note without compromising factory fitment, the Gibson Cat-Back exhaust is a direct bolt-on replacement that requires no modifications. It delivers a muscular sound that enhances the driving experience while minimizing interior drone for comfortable daily use.

Key Features

This exhaust system blends durable materials with thoughtful engineering to provide a high-quality upgrade for your Jeep Wrangler. Key features include:

• Cat-Back single exhaust system tailored for 2004–2006 Jeep Wrangler TJ Unlimited 4.0L I6
• Stainless steel flange connection to the catalytic converter ensures a secure, leak-free fit
• Includes all necessary hardware and factory-style hangers for straightforward installation
• Superflow™ baffled and chambered muffler reduces interior drone while delivering an aggressive exhaust tone
• No internal packing inside the muffler for long-lasting sound quality without degradation
• Polished stainless steel slash-cut exhaust tip provides a clean, professional appearance
• Mandrel-bent stainless steel tubing maintains consistent diameter for optimal exhaust flow and durability
• Backed by a Lifetime Limited Warranty for peace of mind

Construction & Design

Crafted from premium stainless steel, this exhaust system is built to withstand the demanding conditions of off-road driving and exposure to harsh weather. The mandrel-bent tubing preserves a consistent diameter through bends, reducing flow restrictions and promoting efficient exhaust gas evacuation. A stainless steel flange connection to the factory catalytic converter ensures a tight, corrosion-resistant seal that prevents leaks over time.

The Superflow™ muffler features a baffled and chambered design that balances sound control with performance, delivering a deep, aggressive exhaust note without excessive cabin noise. The polished stainless steel slash-cut tip not only enhances the visual appeal but also resists rust and discoloration, maintaining its shine for years to come.

Performance & Sound

Designed to improve low and mid-range torque, this Gibson Cat-Back exhaust system enhances your Jeep Wrangler’s power delivery where it matters most—between idle and 3000 RPM. This results in better throttle response and increased pulling power, especially useful when tackling steep inclines or towing heavy loads. The muffler’s baffled construction minimizes interior drone, allowing you to enjoy a muscular, aggressive exhaust tone without sacrificing cabin comfort.

Installation & Fitment

The Gibson Stainless Steel Cat-Back Single Exhaust is a direct bolt-on replacement for the factory exhaust system on 2004 to 2006 Jeep Wrangler TJ Unlimited 4.0L models. Installation requires no cutting, welding, or modifications, making it accessible for both professional installers and experienced DIY enthusiasts. The system includes factory-style hangers and all necessary hardware to ensure a secure and proper fit. The stainless steel flange connection simplifies alignment and sealing, reducing installation time and complexity.

What's Included

• Cat-Back single exhaust system
• Stainless steel flange connection to catalytic converter
• Polished stainless steel slash-cut exhaust tip
• Superflow™ baffled and chambered muffler
• Factory-style hangers
• All required installation hardware

Ideal For

This exhaust system is ideal for Jeep Wrangler TJ Unlimited owners seeking to boost their vehicle’s low and mid-range power for improved off-road climbing and towing capabilities. It suits off-road enthusiasts who want a durable, high-quality exhaust upgrade that delivers an aggressive yet refined sound without excessive cabin drone. Additionally, it’s perfect for those who desire a professional, polished appearance combined with a hassle-free installation process.

Gibson Performance Exhaust manufactures street-legal performance exhaust systems for trucks, SUVs, UTVs/side-by-sides, and muscle car applications. Known for an aggressive sound and bolt-on fitment, Gibson systems are engineered to improve exhaust flow while maintaining durability for daily driving, towing, and weekend fun.