MagnaFlow Direct Fit Catalytic Converter

2002–2004 Jeep Grand Cherokee WJ 4.0L & 2003–2004 Jeep Grand Cherokee 4.7L

Part #: 51698

Overview

The MagnaFlow Direct Fit Catalytic Converter 51698 is a premium replacement part engineered to restore your Jeep Grand Cherokee’s emissions system to factory standards. Designed specifically for 2002 to 2004 Jeep Grand Cherokee WJ models with 4.0L engines and 2003 to 2004 models with 4.7L engines, this converter ensures your vehicle remains compliant with Federal emissions regulations while maintaining optimal engine performance.

Ideal for Jeep owners seeking a reliable, OEM-grade catalytic converter that fits precisely without the need for modifications, this part helps keep the check engine light off and your vehicle running cleanly and efficiently.

Key Features

MagnaFlow’s Direct Fit Catalytic Converter offers a combination of precision engineering and durable construction to meet or exceed original equipment standards. Key features include:

• Federal/EPA compliant design for OBDII vehicles with California or Federal emission systems
• Exact fitment for 2002–2004 Jeep Grand Cherokee WJ 4.0L and 2003–2004 4.7L engines
• Mandrel-bent tubing for unrestricted exhaust flow and improved performance
• Highly corrosion-resistant stainless steel construction for long-lasting durability
• Single laser fusion weld to minimize leaks and enhance structural integrity
• Compact, low-mass design for superior thermal efficiency and quicker catalyst light-off
• Manufactured using advanced 3D scanning technology to replicate OE specifications precisely
• Direct bolt-on installation—no cutting, welding, or modifications required
• Interchanges with OE part numbers 5208 0369AA, 5208 0439AA, 5210 1224AC, 5210 1228AB, and 5210 1228AC

Construction & Design

Built with premium stainless steel, this catalytic converter resists rust and corrosion, ensuring longevity even under harsh driving conditions. The mandrel-bent tubing maintains a smooth exhaust path, reducing backpressure and promoting efficient engine operation. MagnaFlow’s use of single laser fusion welds enhances the strength of the assembly while preventing exhaust leaks that can trigger diagnostic trouble codes.

State-of-the-art 3D scanning during the research and development phase guarantees that every contour and mounting point matches the original equipment, providing a seamless fit and reliable performance.

Installation & Fitment

This direct-fit catalytic converter is designed for straightforward installation on compatible Jeep Grand Cherokee WJ models. It installs using the existing mounting points and hardware, eliminating the need for cutting, welding, or additional fabrication. With the proper tools, most experienced DIYers can complete the replacement efficiently, saving time and labor costs.

Always verify compatibility with your vehicle’s engine size and model year before installation to ensure proper fitment and compliance.

What's Included

• MagnaFlow Direct Fit Catalytic Converter (Part #51698)
• Pre-installed gaskets and hardware (if applicable)
• Installation instructions

Ideal For

This catalytic converter is perfect for Jeep Grand Cherokee owners who need a reliable, OEM-grade replacement to maintain emissions compliance and vehicle performance. It suits those who prefer a direct-fit solution that requires no modifications and want to avoid costly dealer repairs or aftermarket parts of inferior quality.

Emissions Note

MagnaFlow 51698 meets or exceeds Federal emissions requirements and is compliant with EPA regulations for OBDII federally registered vehicles. It is designed to work with both California and Federal emission systems, ensuring your Jeep remains street-legal 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.