Is this catalytic converter legal for use in California?

Yes, this MagnaFlow catalytic converter is California CARB compliant. It has undergone additional testing to meet or exceed California Air Resource Board requirements, making it legal for use in California and other CARB-restricted states.

What hardware is included for installation?

The converter includes essential gaskets and hardware to simplify installation. You'll find a flange gasket, a Torca clamp, three flat washers, three nuts, and three bolts included in the box.

Does this catalytic converter require welding?

No, this is a direct-fit catalytic converter designed to install without cutting or welding. You will need the proper tools for installation, but it is designed to bolt directly onto your 2001-2005 Porsche 911's exhaust system.

MagnaFlow Conv DF 01-05 Porsche 911 3.6L Front Left (California)

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Specifications

Brand: Magnaflow
Part #: 444066
UPC: 888563062006

MagnaFlow Conv DF 01-05 Porsche 911 3.6L Front Left (California)

Name: MagnaFlow Conv DF 01-05 Porsche 911 3.6L Front Left (California)
Brand: Magnaflow
Price: 1028.00 USD
Availability: InStock

$1028.00

On Backorder — Expected to ship by Apr 26, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2001-2005 Porsche 911. MagnaFlow's CARB-compliant catalytic converter keeps your check engine light off with a direct-fit design.

Key Features

Fits 2001-2005 Porsche 911.
This converter is CARB compliant, designed to meet or exceed California Air Resource Board requirements for legal use in California and CARB-restricted states.
Features free-flowing mandrel-bent tubing that retains the OEM-like design and geometry for smooth exhaust flow.
Constructed with high-strength 16-gauge 409 stainless steel tubing for exceptional corrosion resistance and a long service life.
The single laser fusion weld greatly reduces the possibility of a leak, replicating the OE spun body design for greater thermal efficiency.
Includes essential gaskets and hardware, such as a Torca AccuSeal clamp, flange gasket, bolts, nuts, and washers, to simplify installation.

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Fits this vehicle

Porsche 911 2001-2005

Product Details

The single laser fusion weld on this MagnaFlow catalytic converter is designed to greatly reduce the possibility of a leak, replicating the OE spun body design. This is important because a properly sealed exhaust system is key to keeping your check engine light off and ensuring your 2001-2005 Porsche 911 runs smoothly. MagnaFlow uses advanced 3D scanning during their research and development to ensure this direct-fit converter matches the original equipment's fit and function precisely.

Built with highly corrosion-resistant stainless steel tubing, this converter is made to last. The mandrel-bent tubing is designed for free-flowing exhaust, which helps maintain factory performance and fuel efficiency. Its compact, low-mass design also contributes to greater thermal efficiency. Because this is a direct-fit unit, installation is straightforward with no cutting or welding required, making it a job you can likely handle yourself with the proper tools.

To make installation even easier and ensure a good seal, MagnaFlow includes essential gaskets and hardware like a Torca AccuSeal clamp, flange gasket, bolts, nuts, and washers. This converter is specifically designed to meet or exceed California Air Resource Board (CARB) requirements, making it legal for use in California and other CARB-restricted states for your Porsche 911.