MagnaFlow Direct Fit Catalytic Converter

1999–2004 Jeep Grand Cherokee 4.0L I6

Part #: 49744

Overview

The MagnaFlow Direct-Fit Catalytic Converter 49744 is a precision-engineered replacement part designed specifically for 1999 to 2004 Jeep Grand Cherokee models equipped with the 4.0L inline-six engine. Compatible with Laredo, Limited, and Special Edition trims, this catalytic converter ensures your vehicle meets or exceeds Federal EPA emissions standards while maintaining factory performance and reliability.

Built to replicate the original equipment’s fit and function, this converter helps keep your check engine light off by providing optimal emissions control. It is an ideal solution for Jeep owners seeking a durable, high-quality replacement that installs easily without the need for cutting or welding, restoring your vehicle’s exhaust flow and engine efficiency.

Key Features

MagnaFlow’s Direct-Fit Catalytic Converter combines advanced manufacturing with durable materials to deliver long-lasting, EPA-compliant performance. Key features include:

• Federal/EPA compliant catalytic converter designed specifically for 1999–2004 Jeep Grand Cherokee 4.0L I6 models
• Mandrel-bent tubing preserves OEM exhaust geometry for smooth flow and optimal fuel economy
• Constructed from corrosion-resistant 16 gauge 409 stainless steel tubing for enhanced durability
• OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel reduce noise and vibration
• Single laser fusion weld on spun body design minimizes leak potential
• Compact, low-mass design improves thermal efficiency for faster light-off and effective emissions control
• Precision stamped collector optimizes exhaust flow and engine performance
• Includes essential gaskets and mounting hardware for simplified installation
• Manufactured using state-of-the-art 3D scanning and metrology to ensure exact OE fitment

Construction & Design

This catalytic converter features a robust spun body design crafted from high-strength 16 gauge 409 stainless steel tubing, providing excellent corrosion resistance and long service life. The mandrel-bent tubing maintains the original equipment’s exhaust geometry, ensuring smooth and unrestricted exhaust flow that supports consistent engine operation and fuel efficiency.

The single laser fusion weld creates a strong, leak-resistant seal, while the compact, low-mass construction enhances thermal efficiency, allowing the converter to reach operating temperature quickly for superior emissions control. OE-sized barbed exhaust hangers made from 410 stainless steel help reduce noise and vibration, contributing to a quieter and more comfortable ride.

The precision stamped collector further refines exhaust flow dynamics, supporting optimal engine performance and fuel economy.

Installation & Fitment

Designed as a direct-fit replacement for the 1999–2004 Jeep Grand Cherokee 4.0L I6 models, this catalytic converter installs easily without the need for cutting, welding, or modifications when using proper tools. The included gaskets and mounting hardware streamline the installation process, allowing you to quickly restore your vehicle’s emissions system to factory specifications while maintaining OEM fit and function.

What's Included

• MagnaFlow Direct-Fit Catalytic Converter (Part #49744)
• Essential installation gaskets
• Mounting hardware

Ideal For

This catalytic converter is perfect for Jeep Grand Cherokee owners who require a reliable, EPA-compliant replacement that restores factory emissions performance. It is well suited for those looking to maintain their vehicle’s check engine light status, ensure legal compliance with federal emissions standards, and preserve fuel efficiency without compromising on durability or fitment quality.

Emissions Note

This MagnaFlow catalytic converter meets or exceeds Federal emissions requirements set by the EPA for OBDII federally registered vehicles. It is not legal for sale or installation in California, Colorado, or New York due to state-specific emissions regulations. Always verify local laws before installation.

MagnaFlow is a performance exhaust manufacturer best known for cat‑back and axle‑back systems, mufflers, and catalytic converters engineered for quality sound and improved flow. Their vehicle-specific exhaust options span muscle, import, and truck applications—making MagnaFlow a staple upgrade when you want a deeper tone, cleaner fitment, and a proven performance-focused exhaust setup.