MagnaFlow 5481238 Catalytic Converter - Left

California OBDII Direct-Fit Converter

MagnaFlow catalytic converter 5481238 is a California Grade, CARB-compliant direct-fit replacement for the 2004-2005 Ford F-150, left side. It is built for a direct installation with no cutting or welding required, using stainless steel construction and a spun-body design that follows the original equipment layout.

The MagnaFlow Direct-Fit CALIFORNIA OBDII CONVERTERS line is engineered for vehicle-specific replacement applications where emissions compliance and OE-style fitment matter. For the Ford F-150, this product line focuses on direct replacement geometry, corrosion-resistant materials, and precise sensor placement to help maintain proper exhaust system function.

Key Features

• Fits 2004 Ford F-150, left
• Fits 2005 Ford F-150, left
• California Grade CARB-compliant replacement for listed applications
• Direct-fit design for bolt-on installation
• Stainless steel body and tubing for corrosion resistance
• Ceramic substrate with pre- and post-converter oxygen sensor locations
• OE-style spun body construction with laser fusion weld
• 2.5-inch inlet, outlet, and main piping diameter
• Designed for the Ford F-150 2004-2005 emissions application

Product Details

MagnaFlow 5481238 is built as a specific-fit catalytic converter for the 2004-2005 Ford F-150, left position, with CARB Executive Order D-193-146 listed for the covered vehicles. The stainless steel construction, mandrel-bent tubing, and compact spun-body format are used to match OE-style packaging while supporting thermal efficiency and leak resistance. This part is a direct replacement choice for drivers needing a California-compliant catalytic converter for a Ford F-150 2004-2005 application.

This part cross-references no listed alternate part numbers for the same application.

Common Problems It Can Address

• Check engine light related to catalytic converter efficiency
• Failed emissions inspection on a covered Ford F-150 application
• Corrosion or damage to the original converter body
• Exhaust leaks at the converter housing or weld area
• Fitment issues from a non-OE-style replacement converter

Installation Notes

Install using the proper tools and follow the vehicle-specific exhaust layout. This converter uses a bolt-on inlet and clamp-on outlet design, with inlet mounting hardware listed for the application. No cutting or welding is required for installation on the specified Ford F-150 fitment. Verify oxygen sensor placement before installation and confirm the left-side application matches the vehicle configuration.

Quality Assurance

MagnaFlow uses 3D scanning and metrology during development to verify fit and function against original equipment geometry. This converter is designed to meet or exceed California Air Resources Board requirements for the listed vehicles and has been tested for CARB compliance in California and other CARB-restricted states.