MagnaFlow 339301 Catalytic Converter

California Grade Universal Catalytic Converter

MagnaFlow 339301 is a 3-inch universal catalytic converter built for pre-OBDII applications that require CARB-compliant emissions control. Its stainless steel construction, ceramic substrate, and weld-on design make it a direct choice for custom exhaust work where California-grade compliance is required.

This MagnaFlow California Grade line is engineered for vehicles that must meet California Air Resources Board standards, including listed Ford E-250 Econoline, E-350 Econoline, E-350 Econoline Club Wagon, F-250, and F-350 applications from the pre-OBDII era. Part number 339301 is designed for legal use in California and other CARB-restricted states on the vehicles shown in the fitment data.

Key Features

• Universal fit catalytic converter with 3-inch inlet and 3-inch outlet
• CARB Executive Order D-193-105 for listed pre-OBDII applications
• Stainless steel body and tube construction for corrosion resistance
• Ceramic substrate for exhaust aftertreatment performance
• Round clam shell body with integrated heat shield
• Weld-on inlet and outlet connections for custom exhaust fabrication
• Compatible with 1987-1995 Ford E-250 Econoline, E-350 Econoline, E-350 Econoline Club Wagon, F-250, and F-350 applications listed below

Detailed Description

MagnaFlow 339301 is a universal California Pre-OBDII catalytic converter designed for exhaust systems that need a 3-inch in/out configuration and CARB-compliant emissions hardware. The stainless steel body and tube material help resist corrosion, while the ceramic substrate supports exhaust cleanup in pre-OBDII vehicles. Because this is a universal weld-on converter, cutting and welding are required for proper installation and fitment.

Vehicle coverage includes 1987-1995 Ford E-250 Econoline, 1987-1995 Ford E-350 Econoline, 1987-1995 Ford E-350 Econoline Club Wagon, 1987-1995 Ford F-250, and 1987-1995 Ford F-350 applications listed in the fitment data. For buyers searching for a 3-inch universal California catalytic converter for Ford Econoline or Ford F-Series pre-OBDII exhaust repair, part number 339301 provides a CARB-listed solution for the specified vehicles.

What It Helps Address

• Check engine light concerns related to a failing catalytic converter
• Emissions test failures caused by a worn or inefficient converter
• Corrosion damage in older exhaust systems
• Custom exhaust replacement needs on pre-OBDII Ford vans and trucks
• CARB compliance requirements for listed California and restricted-state applications

Installation Notes

Installation requires cutting and welding because this is a universal weld-on converter. Verify 3-inch inlet and outlet sizing, confirm pre-OBDII application details, and match the vehicle to the fitment list before installation. No oxygen sensor location is provided on this unit, and the design uses straight inlet and outlet orientations.

For Ford E-250 Econoline, E-350 Econoline, and F-250/F-350 exhaust repairs, proper fabrication and alignment are important to maintain exhaust flow and ensure the converter is positioned correctly in the system.

Quality Assurance

MagnaFlow 339301 is built to meet or exceed California Air Resources Board requirements and has undergone additional testing for CARB guideline compliance on the listed vehicles. The part is identified with CARB Executive Order D-193-105 for approved applications.