Walker 84589 Catalytic Converter

CARB-Compliant Direct-Fit Catalytic Converter

Walker CalCat 84589 is a direct-fit catalytic converter built for specific applications on the Buick LaCrosse and Pontiac Grand Prix. It is designed for OBDII and non-OBD vehicles and is CARB certified for use in California and other states that require CARB-compliant replacement converters.

With a stainless steel body, ceramic substrate, and OE-style welded flange connections, this Walker CalCat converter is made for a precise exhaust-system match. The round body design and post-catalyst oxygen sensor location support a factory-style replacement on the listed vehicles.

Key Features

• Walker CalCat direct-fit catalytic converter, part number 84589
• CARB certified and covered by Executive Order D-182-74
• Specific fit for listed Buick LaCrosse and Pontiac Grand Prix applications
• Stainless steel body with ceramic substrate
• 2-bolt welded flange inlet and outlet
• Post-catalyst oxygen sensor location
• OE-style replacement for emissions-related exhaust service

Product Details

Walker CalCat 84589 is engineered for the 2005-2009 Buick LaCrosse and 2005-2007 Pontiac Grand Prix listed in the fitment data. It is a direct-fit catalytic converter that follows the original exhaust layout with a 2-bolt welded flange inlet and outlet, helping maintain the factory-style connection points on the vehicle. The CalCat line is Walker’s CARB-focused replacement converter range, built for applications that must meet California emissions requirements.

This part cross-references 764341 and 5461227 for the same application. For buyers searching for a 2006 Pontiac Grand Prix catalytic converter, 2005 Buick LaCrosse CARB converter, or Walker 84589 direct-fit replacement, this part matches the specified vehicle and emissions requirements.

Common Problems This Part Can Address

• Failed emissions inspection due to a worn or inefficient catalytic converter
• Check engine light related to catalyst efficiency faults
• Restricted exhaust flow from a deteriorated converter substrate
• Exhaust leaks at the converter connection points
• Need for a CARB-compliant replacement on listed vehicles

Installation Notes

• Fits 2009 Buick LaCrosse, N/A
• Fits 2007 Pontiac Grand Prix, N/A
• Fits 2006 Buick LaCrosse, N/A
• Fits 2006 Pontiac Grand Prix, N/A
• Fits 2005 Buick LaCrosse, N/A
• Fits 2005 Pontiac Grand Prix, N/A

Exhaust gasket is recommended during installation. Additional parts needed to complete installation are 31605 and 31532, according to the fitment notes. Verify the engine family number and state emissions requirements before installation, especially for California and other CARB-regulated markets.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the listed applications. Part number 84589 is built as a direct-fit replacement with OE-style fitment and CARB Executive Order D-182-74 coverage for the specified Buick LaCrosse and Pontiac Grand Prix vehicles.