Magnaflow Direct Fit Catalytic Converter

Jeep Grand Cherokee 04

Part #: 4551074

Overview

The Magnaflow Direct Fit Catalytic Converter is a premium replacement part engineered specifically for the 2004 Jeep Grand Cherokee models equipped with the 4.7L V8 engine, including Laredo, Limited, and Overland trims. Designed to meet or exceed original equipment standards, this catalytic converter ensures your vehicle maintains optimal emissions control, helping to keep your check engine light off and your Jeep running clean and efficiently.

Ideal for Jeep owners seeking a reliable, California Air Resource Board (CARB) compliant solution, this converter offers a direct-fit design that requires no cutting or welding during installation. It provides a seamless replacement that preserves factory performance, fuel economy, and exhaust flow characteristics while ensuring compliance with strict emissions regulations.

Key Features

Magnaflow’s direct fit catalytic converter combines advanced engineering with durable materials to deliver a high-quality, long-lasting replacement. Key features include:

• CARB-compliant design certified for legal use in California and other CARB-restricted states
• Mandrel-bent tubing that maintains OEM-like geometry for smooth exhaust flow and optimal engine operation
• Highly corrosion-resistant 16 gauge 409 stainless steel tubing for extended durability
• Single laser fusion weld on the spun body design to minimize leaks and enhance structural integrity
• Precision stamped collector to improve exhaust flow, engine efficiency, and fuel economy
• OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel to reduce noise and vibration
• Compact, low-mass design promoting greater thermal efficiency
• Includes essential gaskets and hardware for simplified installation
• Durable 308 stainless steel MIG welds for strong, long-lasting joints

Construction & Design

Crafted from premium stainless steel materials, the Magnaflow Direct Fit Catalytic Converter is built to withstand harsh operating conditions and resist corrosion over time. The 16 gauge 409 stainless steel tubing offers exceptional durability, while the spun body design is precisely replicated from the original equipment to ensure proper fit and function.

The single laser fusion weld enhances structural integrity and reduces the risk of exhaust leaks, while mandrel-bent tubing preserves smooth bends and flow characteristics identical to the factory part. Additionally, OE-sized barbed exhaust hangers made from 410 stainless steel contribute to noise reduction and vibration control, improving overall driving comfort.

Installation & Fitment

This direct-fit catalytic converter is engineered for a straightforward, bolt-on installation on 2004 Jeep Grand Cherokee Laredo, Limited, and Overland models with the 4.7L V8 engine. No cutting, welding, or modifications are required when using proper tools, making replacement quick and hassle-free.

The converter is designed to interchange with OE part numbers 5208 0358AA and 5208 0378AC, ensuring a precise fit that matches factory specifications. All necessary gaskets and hardware are included to simplify the installation process and restore your vehicle’s emissions system to optimal condition.

What's Included

• Magnaflow Direct Fit Catalytic Converter (Part #4551074)
• Essential gaskets for proper sealing
• Installation hardware

Emissions Note

This catalytic converter is California Air Resource Board (CARB) compliant and has undergone rigorous testing to meet or exceed CARB requirements. It is legal for use in California and other CARB-restricted states on the specified 2004 Jeep Grand Cherokee models. Installing this part ensures your vehicle remains emissions-compliant and environmentally responsible.

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.