MagnaFlow Direct Fit Catalytic Converter

2005–2014 Chrysler 300 / 2008–2014 Dodge Challenger / 2006–2014 Dodge Charger / 2006–2008 Dodge Magnum

21-577

Overview:

The MagnaFlow Direct Fit Catalytic Converter 21-577 is engineered to provide a reliable, OEM-grade replacement for your vehicle’s factory catalytic converter. Designed specifically for select Chrysler and Dodge models from 2005 to 2014, this catalytic converter ensures your vehicle remains compliant with Federal and EPA emissions standards while maintaining optimal engine performance. Ideal for owners looking to keep their check engine light off and preserve factory fuel economy, this direct-fit converter offers a hassle-free installation without the need for cutting or welding.

Whether you drive a Chrysler 300, Dodge Challenger, Charger, or Magnum, this catalytic converter delivers a precise fit and dependable operation, restoring your exhaust system’s efficiency and reducing harmful emissions.

Key Features:

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

• Federal and EPA compliant, meeting or exceeding emissions requirements for OBDII federally registered vehicles
• Free-flowing mandrel-bent tubing that preserves OEM exhaust flow and maximizes fuel economy
• Highly corrosion-resistant 16 gauge 409 stainless steel construction for long-lasting durability
• Spun body design with a single laser fusion weld to minimize leaks and improve thermal efficiency
• Compact, low-mass design that enhances heat retention and catalytic activity
• Exact fit for easy direct replacement—no cutting, welding, or modifications required
• Includes essential gaskets and hardware to simplify installation and avoid issues with corroded factory parts
• Interchanges with OE part numbers 5039 056AG and 5039 056AA
• Developed using state-of-the-art 3D scanning technology to ensure precise replication of OEM specifications

Construction & Design:

This catalytic converter is expertly crafted from high-strength 16 gauge 409 stainless steel tubing, chosen for its exceptional resistance to corrosion and ability to withstand harsh exhaust conditions. The mandrel-bent tubing maintains the original equipment’s geometry, ensuring smooth exhaust flow and preventing restrictions that could impact engine performance.

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

Installation & Fitment:

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

• Chrysler 300 C SRT8 (2005–2010)
• Chrysler 300 SRT8 (2012–2014)
• Chrysler 300 SRT8 Core (2013)
• Dodge Challenger SRT8 (2008–2014)
• Dodge Charger SRT8 (2006–2010, 2012–2014)
• Dodge Magnum SRT8 (2006–2008)

Installation requires basic automotive tools and does not involve cutting or welding, making it accessible for experienced DIY enthusiasts or professional mechanics. The included hardware and gaskets help 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 dependable, EPA-compliant replacement part that restores factory emissions performance without compromising engine efficiency. It suits those who want a direct-fit solution that simplifies installation and ensures long-term durability in Chrysler 300, Dodge Challenger, Charger, and Magnum models within the specified year ranges.

Emissions Note

This MagnaFlow 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. It is designed to work with both California and Federal/EPA emission systems, providing peace of mind for drivers in all states.

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.