Walker 54758 Catalytic Converter

Walker EPA Direct-Fit Catalytic Converter

Walker EPA 54758 is a direct-fit catalytic converter built for OBDII-equipped vehicles from 1997 through 2005. It is designed with a stainless steel body, ceramic substrate, and welded flange connections for a precise exhaust replacement on select Chevrolet, Buick, Oldsmobile, and Pontiac applications.

The Walker EPA Ultra EX Direct-Fit line is aimed at emissions-compliant replacement needs for sensitive OBDII systems. This part number 54758 is shaped for direct installation on the listed applications and is engineered to meet EPA emissions requirements for federal-emissions vehicles.

Key Features

• Direct-fit catalytic converter for specific vehicle applications
• EPA-compliant design for OBDII vehicles
• Stainless steel body construction for exhaust durability
• Ceramic substrate material
• Round body shape with welded 2-bolt flange inlet and outlet connections
• Post-catalyst oxygen sensor location
• Fits select 1997-2005 Buick, Chevrolet, Oldsmobile, and Pontiac models

Fitment Details

• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 2000-2005 Chevrolet Monte Carlo, N/A
• Fits 1997-2004 Buick Regal, N/A
• Fits 2001-2002 Pontiac Grand Prix, N/A
• Fits 1997-2000 Pontiac Grand Prix, N/A
• Fits 1998-1999 Oldsmobile Intrigue, N/A

What It Helps Address

• Check engine light concerns related to catalytic converter efficiency
• Failed emissions testing on the listed EPA federal-emissions applications
• Exhaust restriction caused by a worn or damaged converter
• Fitment issues from using a universal converter instead of a direct-fit unit
• Corrosion-related replacement needs in the exhaust system

Installation Notes

Use the listed year, make, and model coverage to confirm application before ordering. Exhaust gasket is recommended during installation. This converter uses a 2-bolt welded flange inlet and outlet design, with an overall length of 36.5 inches, inlet diameter of 2.750 inches, and outlet diameter of 2.625 inches. Part number 54758 is not CARB certified and is not legal for sale or use in California and other CARB-compliant states; review local regulations before installation. This part cross-references Eastern Catalytic 50321 for the same application.

Quality Assurance

Walker EPA 54758 is part of the Ultra EX Direct-Fit catalytic converter line, built for EPA emissions requirements and OBDII-sensitive applications. The stainless steel construction and direct-fit configuration support consistent replacement performance on the specified vehicles, including Chevrolet Impala, Chevrolet Monte Carlo, Buick Regal, and Pontiac Grand Prix applications.