MagnaFlow 445300 Catalytic Converter

California OBDII Catalytic Converter

MagnaFlow 445300 is a 3-inch universal California OBDII catalytic converter built for select Ford truck and van applications that require CARB-compliant emissions equipment. It uses a stainless steel body with a ceramic substrate and a welded-in universal layout for applications that need cutting and welding during installation.

For drivers searching for a California legal catalytic converter for Ford Excursion, F-250 Super Duty, or F-350 Super Duty applications, this MagnaFlow California Grade unit is engineered to meet CARB requirements for the listed vehicles and help keep the check engine light off.

Key Features

• California Grade CARB-compliant design for listed applications
• Universal fitment with 3-inch inlet and outlet, weld-on installation
• Stainless steel body and stainless steel exhaust piping for corrosion resistance
• Ceramic substrate for emissions control performance
• Round clam shell body with attached heat shield
• Compatible with select Ford Excursion, F-250 Super Duty, and F-350 Super Duty models
• MagnaFlow part number 445300

Product Details

The MagnaFlow 3in. Universal California OBDII Catalytic Converter line is built for applications that need a universal replacement with California emissions compliance. Part number 445300 uses a straight, weld-on inlet and outlet configuration, a 28.5-inch overall length, and a 3-inch main piping diameter. The stainless steel construction supports long-term durability, while the ceramic substrate is used to manage exhaust emissions in OBDII-equipped vehicles. This part cross-references Walker 16337 and Eastern Catalytic 40200 for the same application.

Common Issues This Part Can Address

• Failed catalytic converter emissions testing
• Check engine light related to catalyst efficiency
• Restricted exhaust flow from a worn converter
• Need for a CARB-compliant replacement in California or CARB-restricted states
• Replacement of a damaged or corroded factory converter

Installation Notes

• Cutting and welding are required for installation.
• Uses new hangers, which are not included.
• No oxygen sensor ports are provided.
• Verify engine family and CARB Executive Order coverage before installation.
• Confirm 3-inch inlet and outlet sizing against the vehicle exhaust system.

Quality Assurance

MagnaFlow 445300 is manufactured to meet or exceed California Air Resources Board requirements and has undergone additional CARB testing for legal use on the listed vehicles in California and other CARB-restricted states. This California Grade converter is built for select 1996-2005 Ford applications, including Excursion, F-250 Super Duty, and F-350 Super Duty fitments.