MagnaFlow OEM Grade Direct Fit Catalytic Converter

2005–2014 Chrysler 300C, Dodge Challenger, Charger, Magnum SRT8 6.1L / 6.4L HEMI

Part #: 21-577

Overview

The MagnaFlow Direct Fit Catalytic Converter 21-577 is a premium OEM-grade replacement designed specifically for select Chrysler and Dodge SRT8 models equipped with 6.1L and 6.4L HEMI engines from 2005 through 2014. This catalytic converter restores your vehicle’s emissions control system to factory standards, ensuring compliance with Federal and EPA regulations while maintaining optimal engine efficiency and fuel economy.

Engineered for a precise fit, this direct-fit converter eliminates the need for cutting or welding, making it an ideal solution for owners and mechanics seeking a hassle-free installation. Whether you drive a Chrysler 300C, Dodge Challenger, Charger, or Magnum, this converter helps keep your check engine light off and supports reliable exhaust system performance.

Key Features

MagnaFlow’s Direct Fit Catalytic Converter combines advanced manufacturing with durable materials to replicate original equipment performance and fitment. Key features include:

• Meets or exceeds Federal and EPA emissions standards for OBDII federally registered vehicles
• Mandrel-bent tubing preserves OEM exhaust flow, maximizing fuel economy and engine performance
• Constructed from corrosion-resistant 16 gauge 409 stainless steel for long-lasting durability
• Spun body design with a single laser fusion weld minimizes leaks and enhances thermal efficiency
• Compact, low-mass design improves heat retention and catalytic activity
• Exact OEM fit ensures direct replacement with no cutting, welding, or modifications required
• Includes essential gaskets and mounting hardware for secure, leak-free installation
• Interchanges with OE part numbers 5039 056AG and 5039 056AA
• Developed using state-of-the-art 3D scanning technology for precise OEM replication

Construction & Design

This catalytic converter is expertly crafted from high-strength 16 gauge 409 stainless steel tubing, selected for its exceptional corrosion resistance and ability to withstand the demanding conditions of automotive exhaust systems. The mandrel-bent tubing maintains the original equipment’s geometry, ensuring smooth exhaust flow without restrictions that could hinder engine performance.

The spun body design is precisely replicated, and the single laser fusion weld creates a robust, leak-resistant seal. This construction not only enhances durability but also improves thermal efficiency by reducing heat loss, which is critical for maintaining optimal catalytic converter operation and emissions control.

Installation & Fitment

The MagnaFlow Direct Fit Catalytic Converter 21-577 is designed for straightforward installation on compatible Chrysler and Dodge SRT8 vehicles. It fits the following models and years:

• Chrysler 300C SRT8 (2005–2010, 2012–2014)
• Dodge Challenger SRT8 (2008–2014)
• Dodge Charger SRT8 (2006–2010, 2012–2014)
• Dodge Magnum SRT8 (2006–2008)

Installation requires only basic automotive tools and does not involve cutting or welding, making it accessible for experienced DIY enthusiasts and professional mechanics alike. Included gaskets and hardware ensure a secure, leak-free fit, even when replacing corroded factory components.

What's Included

• MagnaFlow Direct Fit Catalytic Converter (Part #21-577)
• Essential installation gaskets
• Mounting hardware for secure fitment

Ideal For

This catalytic converter is ideal for vehicle owners and mechanics seeking a reliable, EPA-compliant replacement that restores factory emissions performance without sacrificing engine efficiency. It is perfect for those who want a direct-fit solution that simplifies installation and ensures long-term durability in Chrysler 300C, Dodge Challenger, Charger, and Magnum SRT8 models equipped with 6.1L or 6.4L HEMI engines within the specified year ranges.

Emissions Note

The MagnaFlow Direct Fit Catalytic Converter is fully compliant with Federal and EPA emissions standards for OBDII federally registered vehicles. It meets or exceeds all legal requirements for emissions control, ensuring your vehicle remains street-legal and environmentally responsible. This converter is designed to work with both California and Federal/EPA emission systems, providing peace of mind for drivers nationwide.

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.