Walker 84387 Catalytic Converter

Walker CalCat 84387 Catalytic Converter

Walker CalCat 84387 is a direct-fit catalytic converter built for CARB-compliant replacement needs on select Chevrolet Cobalt and Pontiac G5 applications. It is designed for a precise OE-style fit and is validated for use on 2008-2010 vehicles listed in the fitment data.

Key Features

• Direct-fit catalytic converter for specific applications
• CARB certified and approved under Executive Order D-182-73
• Stainless steel body with a round converter housing
• Ceramic substrate for emissions control performance
• 3-bolt welded flange inlet and 2-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor locations
• Two-converter assembly with OE-style dimensions
• Fits 2008-2010 Chevrolet Cobalt and 2008-2009 Pontiac G5

Detailed Description

Walker CalCat 84387 is part of Walker’s CalCat line, a direct-fit emissions solution engineered for vehicles that must meet California Air Resources Board requirements. This product line focuses on OE-style fitment and CARB compliance for OBDII and non-OBD applications, helping simplify replacement selection for regulated exhaust systems. For this application, part number 84387 is listed for 2008-2010 Chevrolet Cobalt and 2008-2009 Pontiac G5 models with the specified engine family numbers and CARB Executive Order coverage.

The converter uses a stainless steel body, ceramic substrate, and welded flange connections to match the original exhaust layout. The assembly measures 38 inches overall, with a round body that is 8 inches long and 4.02 inches in height and width. The outlet outside diameter is 2.595 inches. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Replacement Reasons

• Failed emissions test or catalyst efficiency fault
• Check engine light related to pre- or post-catalyst oxygen sensor readings
• Damaged, rusted, or leaking factory converter assembly
• Exhaust restriction affecting drivability or engine performance
• Need for a CARB-certified replacement on a regulated vehicle

Installation Notes

Fits 2008 Chevrolet Cobalt, N/A; 2009 Chevrolet Cobalt, N/A; 2010 Chevrolet Cobalt, N/A; 2008 Pontiac G5, N/A; and 2009 Pontiac G5, N/A. Exhaust gasket is recommended, and additional parts 31643 and 31311 are listed as needed to complete installation. Mounting hardware is not included. Verify the engine family number and state emissions requirements before installation, and confirm the 3-bolt welded flange inlet and 2-bolt welded flange outlet match the vehicle’s exhaust configuration.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the listed applications. Part number 84387 is CARB certified and carries Executive Order D-182-73 for the covered vehicles.