MagnaFlow Direct Fit Catalytic Converter

Dodge Durango / Jeep Grand Cherokee 13-20 5.7L/3.6L

Part #: 21-251

Overview

The MagnaFlow Direct Fit Catalytic Converter 21-251 is a premium replacement part engineered specifically for Dodge Durango and Jeep Grand Cherokee models equipped with the 3.6L V6 engine from 2013 through 2020. Designed to meet or exceed Federal EPA emissions standards, this catalytic converter ensures your vehicle remains compliant while maintaining optimal engine performance and fuel efficiency. It is an ideal solution for owners addressing a failed catalytic converter or upgrading their emissions system with a durable, direct-fit component that requires no modifications.

Crafted to replicate OEM specifications, this converter helps keep your check engine light off and supports OBDII federally registered vehicles with California or Federal/EPA emission systems. Whether you drive a Dodge Durango or Jeep Grand Cherokee, this MagnaFlow converter offers a reliable, long-lasting emissions solution that fits precisely and installs easily.

Key Features

MagnaFlow’s Direct Fit Catalytic Converter combines advanced manufacturing and high-quality materials to deliver a dependable and efficient emissions control solution. Key features include:

• Free-flowing mandrel-bent tubing that improves exhaust flow and reduces backpressure
• Highly corrosion-resistant 16 gauge 409 stainless steel tubing for enhanced durability
• Spun body design that replicates original equipment for precise fit and function
• Single laser fusion weld to minimize leak potential and increase structural integrity
• Compact, low-mass construction for superior thermal efficiency and faster catalyst light-off
• Engineered to replicate OEM flow dynamics, preserving factory performance and fuel economy
• Includes essential gaskets and mounting hardware for a secure, leak-free installation
• Durable 308 stainless steel MIG welds for added strength and longevity
• Interchanges with OE parts 6811 0125AE and 6811 0125AB

Construction & Design

This catalytic converter is constructed from premium 16 gauge 409 stainless steel tubing, chosen for its excellent resistance to corrosion and ability to withstand the harsh conditions of the exhaust system. The spun body design closely mirrors the original equipment manufacturer’s specifications, ensuring a perfect fit and reliable operation without the need for modifications.

MagnaFlow utilizes advanced 3D scanning technology during product development to guarantee precise dimensions and contours that match the factory part. The single laser fusion weld technique reduces the risk of leaks and enhances overall durability, while the compact, lightweight design promotes faster catalyst activation for improved emissions control from engine start-up.

Installation & Fitment

Installation of the MagnaFlow Direct Fit Catalytic Converter is straightforward and designed as a direct replacement for your vehicle’s factory converter. No cutting, welding, or additional modifications are required. The included gaskets and mounting hardware provide everything needed for a secure and leak-free fit.

This catalytic converter fits a wide range of Dodge Durango and Jeep Grand Cherokee models from 2013 to 2020, including popular trims such as Citadel, Crew, GT, Limited, Pursuit, Rallye, SXT, and more.

What's Included

• MagnaFlow Direct Fit Catalytic Converter (Part #21-251)
• Essential gaskets for installation
• Mounting hardware
• Installation instructions

Ideal For

This catalytic converter is perfect for Dodge Durango and Jeep Grand Cherokee owners who need a reliable, EPA-compliant replacement that fits precisely without modification. It is especially suited for those looking to restore factory emissions performance, eliminate check engine light issues caused by catalytic converter failure, and maintain legal compliance with federal and California emissions standards.

Emissions Note

The MagnaFlow Direct Fit Catalytic Converter 21-251 is designed to meet or exceed Federal emissions requirements established by the EPA. It is compliant with OBDII federally registered vehicles equipped with California or Federal/EPA emission systems, ensuring your vehicle 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.