Magnaflow OEM Grade Direct Fit Catalytic Converter

2005–2010 Chrysler 300 / 2007–2010 Dodge Charger / 2005–2008 Dodge Magnum 2.7L & 3.5L V6 AWD

Part #: 21-540

Overview

The Magnaflow OEM Grade Direct Fit Catalytic Converter is a premium replacement part engineered specifically for select Chrysler and Dodge vehicles equipped with 2.7L and 3.5L V6 engines. Designed to meet or exceed Federal emissions standards, this converter ensures your vehicle remains EPA compliant while maintaining optimal engine performance and fuel efficiency. It is an ideal solution for owners of 2005–2010 Chrysler 300, 2007–2010 Dodge Charger, and 2005–2008 Dodge Magnum models who need a reliable, direct-fit replacement that prevents check engine light issues related to emissions control.

With a focus on precision fitment and durability, this catalytic converter offers a hassle-free installation experience without the need for cutting or welding, making it suitable for both professional mechanics and knowledgeable enthusiasts.

Key Features

Magnaflow’s direct fit catalytic converter combines advanced manufacturing techniques with high-quality materials to deliver dependable performance and long service life. Key features include:

• Federal/EPA compliant design for OBDII federally registered vehicles
• Direct-fit application requiring no cutting, welding, or modifications
• Mandrel-bent tubing that preserves OEM-like exhaust flow geometry
• Highly corrosion-resistant 16 gauge 409 stainless steel tubing
• Spun body construction replicating original equipment design
• Single laser fusion weld to minimize leak potential
• Compact, low-mass design for improved thermal efficiency
• Includes essential gaskets and mounting hardware for simplified installation
• Interchanges with OE part numbers 4581 753AE and 4578 359AA
• Manufactured using state-of-the-art 3D scanning technology for precise fit and function

Construction & Design

Crafted from durable 16 gauge 409 stainless steel, this catalytic converter is built to withstand the demanding conditions of underbody exhaust systems. The mandrel-bent tubing maintains the original exhaust flow path, minimizing restrictions and preserving factory engine efficiency. Its spun body design closely mirrors the OEM converter’s shape and dimensions, ensuring a seamless fit.

The single laser fusion weld enhances structural integrity and reduces the risk of leaks, while advanced 3D scanning technology used during development guarantees precise fitment and reliable performance. This meticulous engineering results in a long-lasting component that meets stringent emissions requirements without compromising vehicle operation.

Installation & Fitment

Designed as a direct-fit replacement, the Magnaflow catalytic converter installs easily using standard automotive tools. No cutting, welding, or exhaust system modifications are necessary, making it an excellent choice for both DIY installers and professional mechanics. The included gaskets and mounting hardware simplify the replacement process, even when dealing with corroded or worn factory components.

This converter fits the following vehicles equipped with 2.7L and 3.5L V6 engines:

• Chrysler 300 Limited (2005–2010)
• Chrysler 300 S (2010)
• Chrysler 300 Signature Series (2009)
• Chrysler 300 Touring (2005–2010)
• Dodge Charger SE (2007–2010)
• Dodge Charger SXT (2007–2010)
• Dodge Magnum SE (2007)
• Dodge Magnum SXT (2005–2008)

What's Included

• Magnaflow Direct Fit OEM Underbody Catalytic Converter (Part #21-540)
• Essential installation gaskets
• Mounting hardware for secure fitment
• Installation instructions

Ideal For

This catalytic converter is perfect for vehicle owners and mechanics seeking a dependable, EPA-compliant replacement that maintains factory emissions control and engine performance. It is especially suited for those who want a straightforward, no-modification installation to keep their vehicle legally compliant and prevent check engine light issues related to emissions.

Emissions Note

The Magnaflow catalytic converter is designed to meet or exceed Federal emissions requirements set by the EPA. It is compliant with OBDII federally registered vehicles equipped with California or Federal/EPA emission systems, providing assurance of genuine emissions compliance for legal road use.

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.