MagnaFlow 334307 Catalytic Converter

California Grade Direct-Fit Converter

MagnaFlow 334307 is a CARB-compliant direct-fit catalytic converter for specific pre-OBDII Ford applications. It is built for straightforward replacement on 1985-1995 Ford Bronco, 1985-1995 Ford F-150, and 1985-1995 Ford F-250 models, with no cutting or welding required during installation.

Part number 334307 uses stainless steel construction, a ceramic substrate, and mandrel-bent tubing to support proper exhaust flow and corrosion resistance. It also interchanges with OE part F4TZ-5F250-D.

MagnaFlow Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS

This MagnaFlow Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS part is engineered for listed California-grade applications that need a direct replacement with OE-style fit and function. Using 3D scanning in the design process, MagnaFlow matches the original equipment layout for the specified Ford trucks and SUVs while meeting CARB requirements for legal use in California and other CARB-restricted states on the listed vehicles.

• CARB-compliant replacement catalytic converter for listed pre-OBDII Ford applications
• Direct-fit design with bolt-on inlet and weld-on outlet
• Stainless steel body and tubing for corrosion resistance
• Ceramic substrate with one air tube and pre-converter oxygen sensor location
• Heat shield attached; hangers included
• Interchanges with OE part F4TZ-5F250-D
• Part number 334307 for catalog and fitment lookup

Compatible Vehicle Fitment

• Fits 1985-1995 Ford Bronco, N/A; Certification Level: PRE-OBDII; CARB Executive Order D-193-104; Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS
• Fits 1985-1995 Ford F-150, N/A; Certification Level: PRE-OBDII; CARB Executive Order D-193-104; Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS
• Fits 1987-1995 Ford F-250, N/A; Certification Level: PRE-OBDII; CARB Executive Order D-193-104; Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS
• Fits 1985 Ford F-250, N/A; Certification Level: PRE-OBDII; CARB Executive Order D-193-104; Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS

Common Issues This Part Can Address

• Failed or restricted catalytic converter on a pre-OBDII Ford Bronco, F-150, or F-250
• Exhaust flow loss caused by a damaged or corroded converter assembly
• Check engine light concerns related to converter performance on listed vehicles
• Need for a CARB-compliant replacement in California or other restricted states
• Replacement of an OE-style converter assembly with the correct direct-fit layout

Installation Notes and Tips

Verify the vehicle’s year, model, and emissions certification before ordering. This converter is specific-fit and uses a bolt-on inlet with a weld-on outlet, so proper exhaust tools and welding capability at the outlet side are required. Confirm oxygen sensor location, pipe diameter, and overall exhaust routing against the original part before installation.

For best results, inspect adjacent exhaust components, hangers, and seals during replacement. MagnaFlow 334307 is designed for the listed Ford applications and should be installed only on the vehicles shown in the fitment data.

Quality Assurance

MagnaFlow uses 3D scanning and metrology-based design validation to help the part match original equipment fit and function. This converter is built to meet or exceed California Air Resources Board requirements for the listed applications and has undergone additional CARB compliance testing for legal use in California and CARB-restricted states.