Magnaflow Direct Fit Catalytic Converter

Dodge Durango / Jeep Grand Cherokee 11-17 5.7L/3.6L

Part #: 5551739

Overview

The Magnaflow Direct-Fit Catalytic Converter is a premium replacement part engineered specifically for the 2011–2017 Dodge Durango and Jeep Grand Cherokee equipped with the 5.7L HEMI engine. Designed to meet or exceed original equipment standards, this catalytic converter ensures your vehicle maintains optimal emissions control while preventing check engine light issues related to emissions system faults.

Ideal for owners who require a reliable, CARB-compliant replacement, this converter offers a direct-fit solution that requires no modifications, making it an excellent choice for both professional mechanics and experienced DIY enthusiasts. Whether replacing a failed factory converter or upgrading to a California Air Resources Board (CARB) certified component, this Magnaflow converter delivers long-lasting durability and consistent performance.

Key Features

Built with advanced manufacturing techniques and premium materials, the Magnaflow Direct-Fit Catalytic Converter offers the following benefits:

• CARB-compliant design certified for legal use in California and other CARB-restricted states
• Direct-fit installation with no cutting, welding, or modifications required
• Mandrel-bent tubing for unrestricted exhaust flow and improved engine efficiency
• Highly corrosion-resistant stainless steel construction for extended service life
• Spun body design replicates original equipment for precise fit and function
• Single laser fusion weld reduces the risk of leaks and enhances durability
• Compact, low-mass design improves thermal efficiency and catalytic performance
• Includes all necessary hardware to simplify installation and replace corroded factory parts
• Developed using state-of-the-art 3D scanning technology to ensure exact OEM fitment

Construction & Design

This catalytic converter features a robust stainless steel body engineered to resist rust and corrosion, ensuring reliable operation even under harsh driving conditions. The mandrel-bent tubing maintains smooth exhaust flow, minimizing backpressure and promoting optimal engine performance. Magnaflow’s precision manufacturing process includes a spun body design that closely mirrors the original equipment, while the single laser fusion weld provides a strong, leak-resistant seal.

The compact and lightweight construction enhances thermal efficiency, allowing the catalyst to reach operating temperature quickly for effective emissions reduction and improved overall vehicle performance.

Installation & Fitment

Designed as a direct-fit replacement for the 2011–2017 Dodge Durango and Jeep Grand Cherokee 5.7L HEMI models, this catalytic converter installs easily using standard automotive tools. No cutting, welding, or special modifications are necessary, making it a straightforward upgrade or repair for both professional mechanics and experienced DIY enthusiasts.

The included hardware kit addresses common challenges posed by corroded factory components, streamlining the installation process and ensuring a secure, leak-free fit that restores your vehicle’s emissions system integrity.

What's Included

• Magnaflow California Grade Direct-Fit Catalytic Converter (Part #5551739)
• Installation hardware kit
• Detailed installation instructions

Ideal For

This catalytic converter is perfect for Dodge Durango and Jeep Grand Cherokee owners who require a reliable, CARB-compliant replacement part that meets or exceeds OEM standards. It is especially suited for drivers living in California or other states with strict emissions regulations, as well as anyone looking to maintain their vehicle’s emissions system integrity without complicated installation procedures.

Emissions Note

This replacement catalytic converter is certified to meet California Air Resources Board (CARB) requirements and has undergone additional testing to ensure compliance with CARB guidelines. It is legal for use in California and other CARB-restricted states on the specified 2011–2017 Dodge Durango and Jeep Grand Cherokee models, helping you maintain emissions compliance and avoid costly penalties.

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.