MagnaFlow 339203 Catalytic Converter

MagnaFlow Direct-Fit Converter for Pre-OBDII Ford Vans and Trucks

MagnaFlow 339203 is a direct-fit catalytic converter built for select pre-OBDII Ford applications. It is engineered to match original equipment dimensions and uses a stainless steel body with a ceramic substrate to support emissions system performance on older vehicles.

This MagnaFlow Direct-Fit CALIFORNIA PRE-OBDII CONVERTERS part line is designed for California-certified applications, including vehicles covered by CARB Executive Order D-193-105. For owners searching for a direct-fit catalytic converter for Ford E-250 Econoline, Ford E-350 Econoline, or Ford F-250/F-350 applications, part number 339203 provides a vehicle-specific replacement format.

• Direct-fit design for specific applications
• Stainless steel tube and body construction
• Ceramic substrate
• Heat shield attached
• Bolt-on inlet and clamp-on outlet
• 2.25-inch inlet diameter and 3-inch outlet diameter
• No oxygen sensor ports
• CARB Executive Order D-193-105 listed in fitment notes

Detailed Product Overview

MagnaFlow 339203 is a catalytic converter assembly intended for pre-OBDII Ford exhaust systems that require a direct-fit replacement with a 3-inch outlet. The round clam shell body measures 26.5 inches in body length and 30.375 inches overall, with a stainless steel finish and aluminized steel heat shield material. The inlet uses a 2.25-inch bolt-on connection, while the outlet is clamp-on for the 3-inch main piping diameter. This configuration supports a clean replacement path for older Ford E-250 Econoline, E-350 Econoline, E-350 Econoline Club Wagon, F-250, and F-350 exhaust layouts.

Part number 339203 is built for vehicles listed as PRE-OBDII and does not use oxygen sensor locations or air tube provisions. That makes it a straightforward emissions component for the specified Ford applications where the original exhaust routing and converter dimensions must be maintained.

Vehicle Applications

• Fits 1988-1995 Ford E-250 Econoline, N/A; Certification Level: PRE-OBDII; 3in. Outlet; CARB Executive Order D-193-105
• Fits 1987-1995 Ford E-350 Econoline, N/A; Certification Level: PRE-OBDII; 3in. Outlet; CARB Executive Order D-193-105
• Fits 1987-1995 Ford E-350 Econoline Club Wagon, N/A; Certification Level: PRE-OBDII; 3in. Outlet; CARB Executive Order D-193-105
• Fits 1987-1995 Ford F-250, N/A; Certification Level: PRE-OBDII; 3in. Outlet; CARB Executive Order D-193-105
• Fits 1987-1995 Ford F-350, N/A; Certification Level: PRE-OBDII; 3in. Outlet; CARB Executive Order D-193-105
• Fits 1987-1991 Ford E-250 Econoline Club Wagon, N/A; Certification Level: PRE-OBDII; 3in. Outlet; CARB Executive Order D-193-105

Installation Notes and Tips

Verify inlet and outlet diameters before installation, especially on pre-OBDII Ford exhaust systems with a 2.25-inch inlet and 3-inch outlet. This converter uses a specific-fit layout with a bolt-on inlet and clamp-on outlet, so matching the existing pipe configuration is important for proper alignment. Inlet mounting hardware is listed as included; other gaskets, clamps, hangers, and outlet hardware are not listed as included.

Because this is a California pre-OBDII application, confirm the vehicle’s emissions requirements and the CARB Executive Order reference before installation. The attached heat shield should be positioned as designed to maintain proper clearance around the exhaust tunnel and nearby components.

Quality Assurance

MagnaFlow designs its catalytic converters to OE-style specifications for the listed applications and builds them with stainless steel construction and a ceramic substrate. The 339203 part number is specified for direct-fit use on the covered Ford models and is identified with CARB Executive Order D-193-105 in the fitment notes.