MagnaFlow Street Series Cat-Back Exhaust System

1999–2004 Jeep Grand Cherokee 4.0L I6, 4.7L V8

Part #: 15859

Overview

The MagnaFlow Street Series Cat-Back Exhaust System is a precision-engineered upgrade designed specifically for the 1999 to 2004 Jeep Grand Cherokee models equipped with 4.0L inline-6 and 4.7L V8 engines. This system replaces the factory exhaust components from the catalytic converter back, delivering improved exhaust flow and a distinctive, resonant tone that enhances your Jeep’s presence on the road.

Ideal for Jeep enthusiasts who want to add a sporty edge to their vehicle’s sound and performance without sacrificing daily drivability, this exhaust system balances aggressive exhaust notes with refined interior sound levels. Whether you drive a Laredo, Limited, Overland (2002–2004), or Special Edition (2004), this direct-fit system is tailored to elevate your Grand Cherokee’s driving experience.

Key Features

Combining advanced engineering with durable materials, the MagnaFlow Cat-Back Exhaust System offers a high-quality upgrade that enhances both performance and style. Key features include:

• Mandrel-bent 2.5-inch main piping for optimal exhaust flow and minimal restriction
• Single straight passenger side rear exit for a clean, aggressive appearance
• Straight-through muffler design to reduce backpressure and improve sound quality
• 4-inch polished welded-on double wall angle cut rolled edge exhaust tips for a premium finish
• Direct-fit design developed using extensive 3D scanning for precise installation
• Manufactured with CNC precision robotic techniques ensuring consistent quality and fitment
• Durable corrosion-resistant stainless steel construction for long-lasting performance
• Backed by MagnaFlow’s 1-year limited finish warranty and limited lifetime construction warranty

Construction & Design

Crafted from high-grade stainless steel, this exhaust system is built to endure the demands of both daily driving and light off-road use. The corrosion-resistant material maintains its polished appearance and structural integrity over time, resisting rust and wear.

The mandrel-bent tubing preserves smooth exhaust flow by eliminating sharp bends, which helps maximize horsepower and torque output. MagnaFlow’s use of CNC precision robotic manufacturing guarantees exact fitment and consistent weld quality, ensuring a reliable, hassle-free upgrade that bolts directly onto your Jeep without cutting or modifications.

Performance & Sound

Dyno-proven to improve exhaust flow, this cat-back system enhances throttle response and overall engine efficiency. The straight-through muffler produces a powerful yet refined exhaust tone that is moderate in exterior volume and mild inside the cabin. This balance delivers an aggressive sound that commands attention at every stoplight without overwhelming interior noise, making it perfect for daily driving and spirited outings alike.

Installation & Fitment

The MagnaFlow Cat-Back Exhaust System is designed for direct bolt-on installation on 1999 to 2004 Jeep Grand Cherokee models, including Laredo, Limited, Overland (2002–2004), and Special Edition (2004). Thanks to precise 3D scanning during development, the system fits perfectly with factory mounting points and requires no cutting, welding, or modifications.

Installation can be completed with basic hand tools and mechanical knowledge, making it accessible for DIY enthusiasts. For the quickest and most precise fitment, professional installation is recommended.

What's Included

• Mandrel-bent 2.5-inch stainless steel main piping
• One straight-through muffler
• Single straight passenger side rear exit pipe
• 4-inch polished welded-on double wall angle cut rolled edge exhaust tip
• All necessary clamps and hardware for installation

Ideal For

This MagnaFlow Cat-Back Exhaust System is perfect for Jeep Grand Cherokee owners seeking a durable, high-quality exhaust upgrade that delivers a sporty tone and improved exhaust flow. It suits enthusiasts who want enhanced performance and sound without compromising reliability or daily comfort, whether for street driving or light off-road adventures.