MagnaFlow 4551020 Catalytic Converter

California OBDII Direct-Fit Converter

MagnaFlow 4551020 is a California Grade, CARB-compliant direct-fit catalytic converter built for the 2003-2004 Honda Pilot and 2001-2002 Acura MDX. It is designed to replace the original exhaust component with bolt-on installation, stainless steel construction, and OE-style fitment for a clean repair.

Key Features

• Direct-fit catalytic converter for specific Honda Pilot and Acura MDX applications
• CARB-compliant design for legal use in California and other CARB-restricted states on listed vehicles
• Stainless steel tube and body construction for corrosion resistance
• Ceramic substrate with a midbed oxygen sensor location
• Bolt-on inlet and outlet for installation without cutting or welding
• Includes gaskets for proper sealing at the exhaust connection
• OE-style spun body design with a single laser fusion weld to reduce leak points
• Interchanges with OE part numbers 18160-PGK-L00 and 18160-PVF-A00

Product Details

This MagnaFlow Direct-Fit CALIFORNIA OBDII CONVERTERS part is engineered using 3D scanning and OE reference data to match the original exhaust layout on the listed vehicles. The compact, low-mass design supports thermal efficiency, while the mandrel-bent tubing and stainless steel body help maintain exhaust flow and durability. MagnaFlow 4551020 is a direct replacement for drivers needing a CARB-approved catalytic converter for a 2003-2004 Honda Pilot or 2001-2002 Acura MDX.

This part cross-references OE numbers 18160-PGK-L00 and 18160-PVF-A00 for the same application.

Common Repair Uses

• Check engine light caused by catalytic converter efficiency faults
• Failed emissions inspection on a California-spec Honda Pilot or Acura MDX
• Exhaust leaks at the converter connection points
• Corrosion-related replacement of the original converter assembly
• Restoring proper exhaust routing on a direct-fit OE-style repair

Installation Notes

Compatible With 2004 Honda Pilot, N/A; 2003 Honda Pilot, N/A; 2002 Acura MDX, N/A; and 2001 Acura MDX, N/A. Use the included gaskets to help achieve a proper seal. This converter uses bolt-on inlet and outlet connections, so proper hand tools are typically all that is needed for installation. Verify the vehicle’s emissions certification and engine family before ordering.

Quality Assurance

MagnaFlow uses 3D scanning during development to help ensure OE-style fit and function. This converter is built to meet or exceed California Air Resources Board requirements for the listed applications and has been tested for CARB compliance on the specified vehicles.