Walker 55727 Catalytic Converter - Rear

EPA Direct-Fit Catalytic Converter

Walker Ultra Direct-Fit Catalytic Converter 55727 is built for EPA-compliant replacement on select OBDII vehicles. It is a direct-fit exhaust solution for the Buick LaCrosse rear application listed below, with welded flange connections for a secure installation.

Key Features

• EPA-compliant catalytic converter for federal emissions applications.
• Direct-fit design for select import and domestic OBDII vehicles.
• Steel body construction with a round converter body.
• Welded flange inlet and outlet connections for a factory-style exhaust interface.
• Walker Ultra Direct-Fit design for replacement use.

Detailed Description

Walker 55727 is a catalytic converter from the EPA product line, engineered as a direct-fit replacement for emissions service. The steel body and welded flange connections support a secure exhaust connection, while the round housing and overall 55.38-inch length reflect the specific packaging required for this application. This part cross-references AP Exhaust 643138 and interchange 644103 for the same application. Fits 2010-2012 Buick LaCrosse, rear.

What It Helps Address

• Failed catalytic converter emissions testing.
• Restricted exhaust flow from a worn converter.
• Check engine light concerns related to catalyst efficiency.
• Replacement needs after converter damage or internal breakdown.

Installation Notes and Quality Assurance

Fitment notes call for an exhaust gasket and additional parts 31311 and 2 of 31337 to complete installation. This application is listed for Fed. and Calif. emission models, with state-use restrictions noted for California and other CARB-compliant states. Walker Ultra Direct-Fit converters are offered for EPA-compliant replacement use on 1996-and-newer OBDII vehicles.