MagnaFlow Direct Fit Catalytic Converter

2013–2020 Dodge Durango / Jeep Grand Cherokee

21-251

Overview:

The MagnaFlow Direct Fit Catalytic Converter 21-251 is engineered to provide a reliable, OEM-grade replacement for your Dodge Durango or Jeep Grand Cherokee from model years 2013 through 2020. Designed to maintain factory emissions standards and keep your check engine light off, this catalytic converter is an ideal solution for drivers seeking a durable, EPA-compliant part that fits precisely without modification. Whether you’re addressing a failed converter or upgrading your emissions system, MagnaFlow’s direct-fit design ensures seamless integration with your vehicle’s exhaust system.

Built to meet or exceed Federal emissions requirements, this converter supports OBDII federally registered vehicles equipped with California or Federal/EPA emission systems. It offers peace of mind for owners who want to maintain legal compliance while preserving optimal engine performance and fuel efficiency.

Key Features:

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

• Free-flowing mandrel-bent tubing for improved exhaust flow and reduced backpressure
• Highly corrosion-resistant 16 gauge 409 stainless steel tubing for long-lasting durability
• Spun body design replicating original equipment for precise fit and function
• Single laser fusion weld to minimize leak potential and enhance structural integrity
• Compact, low-mass construction for superior thermal efficiency and quicker catalyst light-off
• Expertly crafted to replicate OEM flow dynamics, maintaining factory performance and fuel economy
• Includes essential gaskets and hardware to simplify installation
• Durable 308 stainless steel MIG welds for added strength
• 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 exceptional corrosion resistance and ability to withstand harsh exhaust conditions. The spun body design closely mirrors the original equipment manufacturer’s specifications, ensuring a perfect fit and reliable operation. MagnaFlow’s use of advanced 3D scanning technology during research and development guarantees that each unit matches the precise dimensions and contours of the factory part.

The single laser fusion weld technique used in assembly reduces the risk of leaks and enhances the overall durability of the converter. Additionally, the compact and lightweight design promotes faster catalyst activation, improving emissions control efficiency right from engine start-up.

Installation & Fitment:

Installation of the MagnaFlow Direct Fit Catalytic Converter is straightforward and designed for a direct replacement without the need for cutting, welding, or modifications. The included gaskets and hardware provide everything necessary for a secure and leak-free fit. This converter fits a broad range of Dodge Durango and Jeep Grand Cherokee models from 2013 to 2020, including various trims such as Citadel, Crew, GT, Limited, Pursuit, Rallye, SXT, and more.

Compatible vehicle applications include:

• Dodge Durango Citadel (2013–2020)
• Dodge Durango Crew (2013)
• Dodge Durango GT (2017–2020)
• Dodge Durango GT Plus (2020)
• Dodge Durango Limited (2014–2016)
• Dodge Durango Pursuit (2019–2020)
• Dodge Durango Rallye (2014–2015)
• Dodge Durango Special Service (2013–2020)
• Dodge Durango SXT (2013–2020)
• Dodge Durango SXT Plus (2018–2020)
• Jeep Grand Cherokee 75th Anniversary (2016)
• Jeep Grand Cherokee Altitude (2018–2020)
• Jeep Grand Cherokee High Altitude (2018–2020)
• Jeep Grand Cherokee Laredo (2013–2020)
• Jeep Grand Cherokee Limited (2013–2020)
• Jeep Grand Cherokee Limited X (2019–2020)
• Jeep Grand Cherokee Overland (2013–2020)
• Jeep Grand Cherokee Summit (2014–2020)
• Jeep Grand Cherokee Trailhawk (2017–2020)
• Jeep Grand Cherokee Upland (2019–2020)

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 require a reliable, EPA-compliant replacement part that fits precisely without modification. It is especially suited for those looking to restore factory emissions performance, eliminate check engine light issues related to 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.