Walker 81758 Catalytic Converter

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat Part Number 81758 is a direct-fit catalytic converter built for specific applications on 1997-2002 Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. It is CARB certified and engineered for an OE-style fit, making it a practical replacement for emissions-related repairs on covered applications.

Key Features

• Direct-fit, specific application design
• CARB certified for regulated emissions use
• Ceramic substrate with stainless steel body
• Round converter body with 2-bolt welded flange inlet and outlet
• Post-catalyst oxygen sensor location
• Single converter assembly
• Walker CalCat product line for CARB-compliant replacement needs

Product Details

Walker CalCat 81758 is designed, tested, and validated to meet CARB standards on approved applications. The converter uses a ceramic substrate inside a stainless steel housing and is built as a direct-fit replacement with OE-style dimensions for easier alignment with the factory exhaust layout. This part is listed for 1997-2002 Buick Regal, 1997-2002 Pontiac Grand Prix, 1999-2000 Chevrolet Impala, 2000 Chevrolet Monte Carlo, and 1999-1999 Oldsmobile Intrigue applications shown in the fitment data.

This part cross-references 942876 for the same application.

What It Helps Address

• Failed emissions inspection due to a worn catalytic converter
• Check engine light concerns related to catalyst efficiency
• Restricted exhaust flow from a deteriorated converter
• Replacement needs after converter damage or internal breakdown
• CARB compliance requirements on listed Buick Regal, Chevrolet Impala, Pontiac Grand Prix, and related applications

Installation Notes and Tips

• Verify the engine family number and CARB Executive Order before installation.
• Additional parts are required to complete installation: 31605 and 31578.
• Exhaust gasket is recommended on select Colorado applications noted in fitment.
• Mounting hardware is not included.
• Confirm the vehicle uses the listed 2-bolt welded flange inlet and outlet configuration.

Quality Assurance

Walker CalCat converters are validated for CARB compliance on the applications listed in the fitment data. Part Number 81758 is a CARB-certified replacement catalytic converter designed for specific vehicle coverage and emissions-system requirements.