Magnaflow Direct Fit Catalytic Converter

Fits Most Chrysler/Dodge 5.7L/3.5L (05-10)

Part #: 21-539

Overview

The Magnaflow Direct Fit Catalytic Converter is a premium OEM-grade replacement designed specifically for select Chrysler and Dodge vehicles equipped with 2.7L and 3.5L V6 engines. Compatible with 2005–2010 Chrysler 300, 2007–2010 Dodge Charger, and 2005–2008 Dodge Magnum models, this catalytic converter ensures your vehicle meets or exceeds Federal EPA emissions standards. It is engineered to maintain optimal engine performance and fuel efficiency while preventing check engine light issues related to emissions.

Ideal for drivers seeking a reliable, direct-fit solution, this converter installs easily without cutting or welding, restoring your vehicle’s emissions system to factory specifications. Whether replacing a faulty converter or upgrading your exhaust system, the Magnaflow 21-539 offers long-lasting durability and peace of mind with precise fitment and compliance.

Key Features

Magnaflow’s Direct Fit Catalytic Converter combines advanced engineering with high-quality materials to deliver superior performance and durability. Key features include:

• OEM-grade catalytic converter compliant with Federal/EPA emissions standards
• Direct-fit design for easy installation with no cutting or welding required
• Mandrel-bent tubing that preserves OEM exhaust flow and geometry
• Constructed from corrosion-resistant 16 gauge 409 stainless steel for extended service life
• Spun body design with a single laser fusion weld to minimize leaks and enhance thermal efficiency
• Compact, low-mass construction improves heat retention and catalytic activity
• Includes all necessary hardware and gaskets for hassle-free installation
• Engineered using state-of-the-art 3D scanning technology for precise fit and function
• Interchanges with OE part numbers 4581 752AD and 4578 358AA
• Compatible with OBDII federally registered vehicles equipped with California or Federal/EPA emission systems

Construction & Design

This catalytic converter is expertly crafted from durable 16 gauge 409 stainless steel tubing, chosen for its excellent resistance to corrosion and ability to withstand harsh exhaust conditions. The mandrel-bent tubing maintains the original equipment’s flow dynamics, ensuring smooth exhaust gas passage without restrictions that could impact engine efficiency.

The spun body design replicates the factory converter’s shape with precision, featuring a single laser fusion weld that reduces the risk of leaks compared to traditional welds. This design also contributes to a more compact and thermally efficient converter, allowing it to reach optimal operating temperatures quickly and maintain catalytic performance over time.

Installation & Fitment

The Magnaflow Direct Fit Catalytic Converter is designed for straightforward installation using standard automotive tools. Its direct-fit design means no cutting, welding, or modifications are necessary, making it an ideal replacement for the factory catalytic converter. All required hardware and gaskets are included to simplify installation and avoid issues commonly caused by corroded or seized factory components.

This converter fits the following vehicles and engine configurations:

• Chrysler 300 Limited (2005–2010) 2.7L & 3.5L V6
• Chrysler 300 S (2010) 3.5L V6
• Chrysler 300 Signature Series (2009) 3.5L V6
• Chrysler 300 Touring (2005–2010) 2.7L & 3.5L V6
• Dodge Charger SE (2007–2010) 2.7L & 3.5L V6
• Dodge Charger SXT (2007–2010) 2.7L & 3.5L V6
• Dodge Magnum SE (2007) 3.5L V6
• Dodge Magnum SXT (2005–2008) 2.7L & 3.5L V6

What's Included

• Magnaflow Direct Fit Catalytic Converter (Part #21-539)
• Installation hardware: bolts, nuts, clamps
• Gaskets for proper sealing
• Detailed installation instructions

Ideal For

This catalytic converter is perfect for vehicle owners who need a dependable, EPA-compliant replacement that restores factory emissions performance without sacrificing engine efficiency. It suits those who prefer a direct-fit solution that minimizes installation time and complexity. Whether repairing a damaged converter or maintaining your vehicle’s emissions system, the Magnaflow 21-539 provides a durable, high-quality option engineered for long-term reliability.

Emissions Note

This replacement catalytic converter is designed to meet or exceed Federal emissions requirements as established by the EPA. It is compliant with legal standards for 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.