Will this catalytic converter pass emissions testing in California?

This MagnaFlow catalytic converter is EPA-compliant but is not CARB approved. It cannot be shipped to California and may not be legal for sale or use on vehicles registered in California or states that have adopted California emissions standards.

What is included with this catalytic converter?

This direct-fit catalytic converter includes essential gaskets and hardware needed for installation. The manufacturer's description confirms that the converter itself is included.

How does this converter compare to the original equipment?

MagnaFlow uses 3D scanning to ensure this converter replicates the original equipment's fit and function. The design aims to maintain factory performance and fuel efficiency, and it interchanges with OE part numbers like 2L7Z-5E212-AA and 4L7Z-5E212-AA.

MagnaFlow Conv DF 03 Lincoln Navigator 5.4L

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Specifications

Brand: Magnaflow
Part #: 51801
UPC: 841380063519

MagnaFlow Conv DF 03 Lincoln Navigator 5.4L

Name: MagnaFlow Conv DF 03 Lincoln Navigator 5.4L
Brand: Magnaflow
Price: 768.00 USD
Availability: InStock

$768.00

On Backorder

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

Fits 2003-2004 Lincoln Navigator. Magnaflow direct-fit catalytic converter helps keep the check engine light off with EPA-compliant performance.

Key Features

Fits 2003-2004 Lincoln Navigator 5.4L.
Keeps the check engine light off by meeting Federal emissions requirements.
Constructed with high-strength 16-gauge 409 stainless steel tubing for excellent corrosion resistance.
Mandrel-bent tubing maintains factory performance and fuel efficiency by eliminating flow restrictions.
Direct-fit design replicates original equipment fit and function, requiring no cutting or welding for installation.
Features a single laser fusion weld to minimize leak potential and a compact, low-mass design for thermal efficiency.

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Fits this vehicle

Lincoln Navigator 2003-2004

Product Details

This is the MagnaFlow Direct-Fit Catalytic Converter, part number 51801, specifically made for your 2003-2004 Lincoln Navigator with the 5.4L engine. If your check engine light is on due to emissions issues, this converter is designed to help get it turned off and keep it off, ensuring your Navigator runs cleanly and legally. It's built to meet or exceed Federal emissions requirements, making it a solid choice for OBDII federally registered vehicles, including those with California or Federal/EPA emission systems.

MagnaFlow puts a lot of effort into making sure these converters fit right the first time. They use the latest 3D scanning technology during their research and development to replicate the original equipment's fit and function precisely. The tubing is mandrel-bent to maintain consistent diameter and eliminate flow restrictions, which helps your engine breathe easier and maintain factory performance and fuel efficiency. The construction uses high-strength 16-gauge 409 stainless steel for the tubing, offering excellent resistance to corrosion and a long service life. The single laser fusion weld is designed to be very strong, greatly reducing the chance of leaks, and the compact, low-mass design helps with thermal efficiency.

Installation is designed to be straightforward, with no cutting or welding required, so you can likely tackle it yourself with the right tools. Essential gaskets and hardware are included in the box to simplify the process. This converter interchanges with original equipment part numbers like 2L7Z-5E212-AA and 4L7Z-5E212-AA.