Walker 16870 Catalytic Converter - Front

Walker EPA Direct-Fit Catalytic Converter

Walker EPA 16870 is a direct-fit catalytic converter for select Buick LaCrosse applications. Built with a round steel body and welded flange connections, it is designed for OBDII-equipped vehicles and follows EPA compliance requirements for the listed fitments.

The Walker EPA line focuses on direct-fit exhaust replacement parts for import and domestic vehicles, with application-specific fitment and emissions compliance guidance for the vehicle listings shown below.

Key Features

• Direct-fit catalytic converter for listed Buick LaCrosse front applications
• Round steel body construction
• Welded flange inlet and outlet connections
• Overall length: 16.00 inches
• Designed for EPA-compliant use on the specified vehicles
• Fits front position, toward radiator, on the listed applications

Fitment Details

• Fits 2012-2016 Buick LaCrosse, front, toward radiator; fits Federal and California emission models; not legal for sale or use in California and other CARB-compliant states; legal in New York and Maine on EPA Federal Emission Equipped Vehicles only.
• Fits 2010 Buick LaCrosse, front, toward radiator; fits Federal and California emission models; not legal for sale or use in California and other CARB-compliant states; legal in New York and Maine on EPA Federal Emission Equipped Vehicles only.

What This Part Helps Address

• Failed catalytic converter efficiency codes
• Exhaust restriction from a damaged converter substrate
• Emissions test failure on the listed Buick LaCrosse applications
• Exhaust leaks at the converter connection points
• Replacement needs for a front, radiator-side converter location

Installation Notes

Use the listed vehicle fitment exactly: 2012-2016 Buick LaCrosse front and 2010 Buick LaCrosse front. An exhaust gasket is recommended, and additional part 31337 is noted as needed to complete installation. Verify state and local emissions regulations before installation, since this part is not legal for sale or use in California and other CARB-compliant states.

This part cross-references AP Exhaust 641476 for the same application.

Quality Assurance

Walker EPA 16870 is built as a direct-fit emissions replacement for the specified Buick LaCrosse applications, with EPA-focused compliance and application-specific fitment guidance. Part number 16870 is also referenced under interchange number 20805600.