Magnaflow Direct Fit Catalytic Converter

Dodge Durango / Jeep Grand Cherokee 11-12 5.7L/3.6L

Part #: 5551879

Overview

The Magnaflow Direct Fit Catalytic Converter (Part #5551879) is a premium emissions control solution designed specifically for the 2011 Dodge Durango and 2011–2012 Jeep Grand Cherokee equipped with the 5.7L HEMI engine. Engineered to meet or exceed California Air Resources Board (CARB) standards, this catalytic converter ensures your vehicle remains compliant with strict emissions regulations while maintaining optimal engine performance.

Ideal for owners replacing a failed catalytic converter or upgrading to a CARB-compliant component, this direct-fit converter replicates original equipment manufacturer (OEM) specifications for a seamless installation and reliable operation. It helps prevent check engine light issues related to emissions and supports clean exhaust output without sacrificing power or efficiency.

Key Features

Magnaflow’s direct-fit catalytic converter combines advanced engineering and durable materials to deliver dependable emissions control and long-lasting performance. Key features include:

• CARB-compliant design certified for legal use in California and other CARB-restricted states
• Direct-fit application tailored for 2011 Dodge Durango and 2011–2012 Jeep Grand Cherokee 5.7L HEMI engines
• Free-flowing mandrel-bent tubing that promotes optimal exhaust flow and reduces backpressure
• Highly corrosion-resistant stainless steel construction for extended durability
• Spun body design with a single laser fusion weld to minimize leak potential
• Compact, low-mass construction for improved thermal efficiency and faster catalyst light-off
• Includes exhaust gaskets to ensure a proper seal and prevent leaks
• Developed using state-of-the-art 3D scanning technology for precise replication of OE parts

Construction & Design

Constructed from premium stainless steel, this catalytic converter resists rust and corrosion, ensuring longevity even under harsh driving conditions. The spun body design closely replicates OEM specifications, guaranteeing a precise fit and reliable performance. A single laser fusion weld enhances structural integrity and reduces the risk of exhaust leaks that could compromise emissions control.

The mandrel-bent tubing maintains a smooth internal diameter, preventing restrictions in exhaust flow that can negatively impact engine efficiency. This thoughtful engineering supports effective catalytic conversion while maintaining the durability required for everyday driving and long-term use.

Installation & Fitment

This Magnaflow catalytic converter is designed for a straightforward, direct-fit installation on 2011 Dodge Durango and 2011–2012 Jeep Grand Cherokee models with the 5.7L HEMI engine. No cutting, welding, or modifications are necessary when using the proper tools, making it an excellent choice for both professional mechanics and experienced DIY enthusiasts. Included exhaust gaskets help ensure a secure, leak-free connection to the existing exhaust system.

Thanks to precise 3D scanning and metrology during development, this converter aligns perfectly with OEM mounting points and exhaust flanges, reducing installation time and minimizing potential complications.

What's Included

• Magnaflow California Grade Direct-Fit Catalytic Converter (Part #5551879)
• Exhaust gaskets for proper sealing
• Installation instructions (where applicable)

Ideal For

This catalytic converter is perfect for owners of 2011 Dodge Durango and 2011–2012 Jeep Grand Cherokee vehicles equipped with the 5.7L HEMI engine who require a reliable, CARB-compliant replacement. It is well-suited for those looking to maintain emissions compliance, avoid check engine light issues, and restore factory-level exhaust performance without extensive modifications or custom fabrication.

Emissions Note

Magnaflow’s California Grade Direct-Fit Catalytic Converter meets or exceeds California Air Resources Board (CARB) requirements and has undergone rigorous testing to ensure compliance. This certification allows for legal installation and use in California and other CARB-restricted states on the specified vehicle models, providing confidence in emissions performance and regulatory adherence.

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.