Magnaflow Direct Fit Catalytic Converter

2012–2019 Jeep Grand Cherokee 6.4L SRT8 / SRT 392

Part #: 21-578

Overview

The Magnaflow Direct Fit Catalytic Converter is a premium OEM-grade replacement designed specifically for the 2012 through 2019 Jeep Grand Cherokee models equipped with the 6.4L SRT8 and SRT 392 engines. Engineered to meet or exceed Federal emissions standards, this catalytic converter ensures your vehicle remains compliant with environmental regulations while maintaining optimal engine performance and fuel efficiency.

Ideal for Jeep owners seeking a reliable and durable replacement part, this converter fits precisely without the need for cutting or welding, making it a perfect solution for both routine exhaust repairs and exhaust system upgrades. With its precise fit and high-quality construction, it helps keep your check engine light off and your exhaust system functioning smoothly.

Key Features

Designed with quality, compliance, and performance in mind, the Magnaflow Direct Fit Catalytic Converter offers the following key features:

• Federal/EPA compliant to ensure legal emissions standards for OBDII vehicles
• Direct-fit design tailored for 2012–2019 Jeep Grand Cherokee SRT and SRT8 models
• Mandrel-bent tubing eliminates flow restrictions and maintains OEM-like exhaust geometry
• Constructed from high-strength 16 gauge 409 stainless steel tubing for superior corrosion resistance
• Durable 308 stainless steel MIG welds provide enhanced structural integrity
• Engineered using advanced 3D scanning technology for precise fit and function
• Maintains factory performance and fuel efficiency by replicating OEM flow dynamics
• Includes essential gaskets and hardware for simplified, leak-free installation
• Interchanges with OE parts 5181 677AI and 5181 677AC

Construction & Design

This catalytic converter is expertly crafted from premium 16 gauge 409 stainless steel tubing, known for its excellent resistance to corrosion and high temperatures. The mandrel-bent tubing preserves the original exhaust system’s geometry, ensuring smooth exhaust flow without restrictions or turbulence.

High-quality 308 stainless steel MIG welds create durable, long-lasting joints that withstand the rigors of daily driving and harsh environmental conditions. Utilizing state-of-the-art 3D scanning and metrology techniques, Magnaflow’s engineering team guarantees a precise fit that replicates the original equipment’s flow characteristics and physical dimensions, eliminating the need for modifications or custom fabrication.

Installation & Fitment

The Magnaflow Direct Fit Catalytic Converter is designed for straightforward, DIY-friendly installation. It fits directly into the factory exhaust system of Jeep Grand Cherokee models from 2012 through 2019, including the SRT (2014–2019) and SRT8 (2012–2013) trims, without requiring cutting, welding, or additional fabrication. Essential gaskets and mounting hardware are included to facilitate a secure and leak-free connection, making installation quick and hassle-free.

What's Included

• Magnaflow direct-fit catalytic converter
• Essential gaskets for installation
• Mounting hardware
• Installation instructions

Ideal For

This catalytic converter is ideal for Jeep Grand Cherokee owners who need a dependable, EPA-compliant replacement part that maintains factory emissions performance. It is perfect for those performing routine exhaust repairs or restoring their vehicle’s emissions system to OEM standards without compromising fuel economy or engine efficiency.

Emissions Note

This part is Federal/EPA compliant and designed to meet or exceed emissions requirements for OBDII federally registered vehicles. It is suitable for vehicles with California or Federal/EPA emission systems, ensuring legal compliance and environmental responsibility.

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.