MBRP Cat Back Exhaust System

Jeep Wrangler 04-06 4.0L I6

Part #: S5520AL

Overview

The MBRP Cat Back Exhaust System with a single turndown exit is designed specifically for Jeep Wrangler TJ Unlimited models from 1997 through 2006 equipped with the 4.0L engine. This aluminized steel exhaust system offers an excellent balance of durability and affordability, making it an ideal upgrade for Jeep enthusiasts seeking enhanced performance and a more aggressive exhaust note without breaking the bank. Engineered to replace the factory exhaust from the catalytic converter back, it improves exhaust flow and delivers a bold race-inspired sound that complements the rugged character of the Wrangler.

Whether you’re tackling off-road trails or cruising city streets, this exhaust system provides a noticeable improvement in throttle response and overall driving enjoyment. Its single turndown exit design adds a distinctive visual touch while maintaining a clean, functional look.

Key Features

Designed to meet the needs of Jeep Wrangler owners looking for a performance upgrade, the MBRP Cat Back Exhaust System offers the following key features:

• Constructed from aluminized steel for corrosion resistance in dry climates
• 2.5-inch diameter tubing for improved exhaust flow and performance
• Single turndown exit for a unique and aggressive exhaust tip appearance
• Race Profile sound for a deep, throaty, and aggressive exhaust tone
• Direct bolt-on fitment for Jeep Wrangler TJ Unlimited 4.0L models (1997–2006)
• Includes all necessary hardware for straightforward installation
• 3-year warranty for peace of mind and product reliability
• Armor Lite series design balances weight and durability

Construction & Design

This exhaust system is crafted from aluminized steel, a material known for its excellent resistance to rust and corrosion in dry, salt-free environments. While not stainless steel, aluminized steel provides a cost-effective solution that maintains durability and longevity under typical driving conditions. The 2.5-inch tubing diameter is optimized to enhance exhaust gas flow, reducing backpressure and improving engine efficiency.

The single turndown exit is designed not only for performance but also for style, giving your Jeep a distinctive look that stands out on and off the road. The Armor Lite series construction ensures a robust build that can handle the demands of daily driving and spirited off-road adventures.

Performance & Sound

The MBRP Cat Back Exhaust System features a Race Profile sound, delivering an aggressive and powerful exhaust note that mimics the tone of a race track vehicle. This system enhances your Jeep’s auditory presence, making it sound more muscular and performance-oriented without overwhelming drone during highway cruising. The improved exhaust flow can also contribute to better throttle response and a more engaging driving experience.

Installation & Fitment

Designed as a direct bolt-on replacement for the Jeep Wrangler TJ Unlimited 4.0L models from 1997 to 2006, this exhaust system installs easily with basic hand tools and no modifications required. The included hardware and detailed instructions simplify the installation process, allowing enthusiasts to upgrade their exhaust system quickly and efficiently. Professional installation is recommended for those unfamiliar with exhaust work to ensure optimal fit and performance.

What's Included

• Aluminized steel cat back exhaust system with single turndown exit
• All necessary mounting hardware and clamps
• Installation instructions

Ideal For

• Jeep Wrangler TJ Unlimited owners seeking a cost-effective performance exhaust upgrade
• Drivers who want a more aggressive, race-inspired exhaust sound
• Off-road enthusiasts looking to enhance throttle response and exhaust flow
• Those living in dry climates who want durable aluminized steel construction
• Jeep owners who prefer a distinctive single turndown exhaust tip design

MBRP builds performance exhaust systems engineered for bold sound, improved flow, and durable fitment across gas and diesel trucks, as well as select cars. From workhorse tow rigs to weekend builds, MBRP is known for offering multiple series and configurations so owners can choose the tone and construction that match how hard the vehicle gets driven.