Magnaflow OEM Grade Direct Fit Catalytic Converter

1999–2001 Jeep Grand Cherokee 4.0L I6

Part #: 49420

Overview

The Magnaflow OEM Grade Direct Fit Catalytic Converter 49420 is a precision-engineered replacement designed specifically for the 1999 to 2001 Jeep Grand Cherokee equipped with the 4.0L inline-six engine. This rear catalytic converter offers a reliable, direct-fit solution that restores your vehicle’s emissions control system to factory standards without the need for modifications. Ideal for Jeep owners who want to maintain optimal engine performance while ensuring compliance with Federal emissions regulations, this converter helps keep your check engine light off and your exhaust system functioning efficiently.

Whether you are performing routine maintenance or addressing emissions-related repairs, this Magnaflow catalytic converter provides a durable, high-quality replacement that fits seamlessly into your Jeep’s exhaust system. Its OEM-grade construction guarantees long-lasting performance and peace of mind.

Key Features

Magnaflow’s catalytic converter combines advanced engineering with premium materials to deliver a product that meets or exceeds Federal EPA emissions requirements. Key features include:

• OEM-grade direct-fit design for a seamless replacement with no cutting or welding required
• Mandrel-bent tubing to maintain smooth exhaust flow and prevent restrictions
• High-strength 16 gauge 409 stainless steel tubing for superior corrosion and heat resistance
• Durable 308 stainless steel MIG welds for enhanced structural integrity and leak prevention
• State-of-the-art 3D scanning technology ensures precise fit and flow characteristics matching original equipment
• Meets or exceeds Federal EPA emissions standards for OBDII-equipped vehicles
• Includes all essential gaskets and mounting hardware for a secure, leak-free installation
• Interchanges with OE part numbers 52101390 and 52101393

Construction & Design

This catalytic converter is expertly crafted using premium-grade materials designed to withstand the harsh conditions of exhaust system operation. The 16 gauge 409 stainless steel tubing offers excellent resistance to corrosion and high temperatures, ensuring a long service life. Mandrel bending preserves the original exhaust geometry, preventing flow restrictions that could negatively impact engine performance and fuel economy.

Welds are performed using robust 308 stainless steel MIG techniques, providing a strong, leak-free assembly. The use of advanced 3D scanning technology during the design process allows Magnaflow to replicate the exact dimensions and flow dynamics of the original catalytic converter, guaranteeing a perfect fit and reliable operation.

Installation & Fitment

The Magnaflow Direct-Fit Catalytic Converter 49420 is designed for a straightforward installation experience. It fits directly into the exhaust system of 1999 to 2001 Jeep Grand Cherokee 4.0L models without requiring cutting, welding, or any other modifications. This direct-fit design reduces installation time and complexity, making it suitable for both professional mechanics and knowledgeable DIY enthusiasts equipped with the proper tools.

All necessary gaskets and mounting hardware are included to ensure a secure, leak-free connection, allowing you to restore your vehicle’s emissions system quickly and efficiently.

What's Included

• Magnaflow Direct-Fit Catalytic Converter 49420
• Essential installation gaskets
• Mounting hardware

Ideal For

This catalytic converter is ideal for Jeep Grand Cherokee owners seeking a reliable, EPA-compliant replacement that maintains factory performance and emissions standards. It is perfect for those performing routine maintenance, emissions repairs, or restoring exhaust system integrity without compromising fuel economy or engine operation.

Emissions Note

This product complies with Federal EPA emissions regulations for OBDII-equipped vehicles but is not legal for sale or installation in California, Colorado, or New York. It is designed to meet or exceed Federal emissions requirements and is suitable for vehicles with California or Federal/EPA emission systems outside of these states.

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.