AP Exhaust 644143 Catalytic Converter - Front Right

AP Exhaust 644143 Catalytic Converter

AP Exhaust 644143 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It uses a ceramic substrate inside a stainless steel body to support efficient exhaust treatment on the front right side of the vehicle.

Compatible with 2010-2011 Buick LaCrosse front right applications, this converter is built for direct replacement service and is also cross-referenced to 20907468 for the same application.

Key Features

• Federal / EPA direct-fit catalytic converter
• Ceramic substrate material for exhaust emission control
• Stainless steel body construction
• 3-bolt welded flange inlet and 2-bolt welded flange outlet
• No O2 sensor ports
• Overall length: 10.5 in.
• Built to OE dimensions for proper fitment

Detailed Description

AP Exhaust part number 644143 is engineered as a direct replacement catalytic converter for the front right position on select Buick LaCrosse models. The converter uses AP Emissions Technologies’ ARISTO substrate chemistry and advanced manufacturing methods to support efficient catalyst loading while maintaining consistent dimensions and fitment. For buyers searching for a 2010-2011 Buick LaCrosse front right catalytic converter, 644143 provides a direct-fit solution with the correct flange configuration and stainless steel construction.

This part is intended for Federal / EPA applications and is listed for 2010-2011 Buick LaCrosse front right vehicles with Federal and California emissions configurations. This part cross-references 20907468 for the same application.

What It Helps Address

• Failed catalytic converter emissions testing
• Check engine light concerns related to catalyst efficiency
• Restricted exhaust flow from a worn converter
• Replacement needs after corrosion or internal substrate breakdown
• Direct-fit repair requirements for the front right exhaust position

Installation Notes and Tips

Verify the vehicle’s emissions configuration before ordering, since this part is not for sale or use on vehicles licensed in CA, CO, ME, or NY. Confirm the front right position, inlet and outlet flange style, and overall length before installation. Because this converter has no O2 sensor ports, reuse the vehicle’s existing sensor arrangement as applicable to the original exhaust layout.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to OE dimensions and fitment standards. The stainless steel body and ceramic substrate are selected to support consistent construction and emissions-system service life.