Dorman 679-543 Catalytic Converter - Rear
OE-Style Rear Catalytic Converter
This Dorman catalytic converter, part number 679-543, is built for specific rear exhaust applications and follows the original equipment fit and function for a direct replacement. It is a specific-fit, standard replacement unit for 2010-2011 Buick LaCrosse and 2010 Buick Allure rear positions.
With a stainless steel body, ceramic substrate, flanged inlet and outlet, and attached heat shield, this converter is built for a clean OE-style installation on the listed vehicles. Dorman 679-543 also includes the required gaskets and outlet mounting hardware noted in the product data.
Key Features
- Specific-fit catalytic converter for rear exhaust placement
- Fits 2010-2011 Buick LaCrosse, rear
- Fits 2010 Buick Allure, rear
- Stainless steel body with natural finish
- Ceramic substrate for exhaust aftertreatment service
- Flanged inlet and flanged outlet for OE-style connection points
- Heat shield attached
- Inlet gasket and outlet gasket listed in the product data
- Standard replacement grade
Detailed Description
Dorman 679-543 is a rear catalytic converter engineered for direct replacement on the listed Buick applications. The unit uses a stainless steel cylinder-style body with a ceramic substrate, flanged inlet and outlet, and a 70 mm outlet outside diameter. Its specific-fit design supports OE-style alignment on 2010-2011 Buick LaCrosse and 2010 Buick Allure rear exhaust systems. This part cross-references AP Exhaust 644143 and Eastern Catalytic 50578 for the same application.
Common Repair Applications
- Replacement for a damaged or restricted rear catalytic converter
- Restores proper exhaust flow on a Buick LaCrosse rear exhaust system
- Addresses emissions-related fault conditions tied to converter efficiency
- Replaces a rusted or leaking OE converter assembly
- Supports repair of exhaust noise caused by a failing converter housing or flange seal
Installation Notes
Verify the rear position, flange style, inlet and outlet dimensions, and vehicle year before installation. This converter is specific to the listed Buick models, so match the original exhaust layout and mounting points during removal and installation. Use the included gaskets and outlet mounting hardware as specified in the product data, and confirm all flange surfaces are clean and flat before tightening.
Quality Assurance
Dorman designs this converter to match original equipment fit and function on the specified vehicles. The stainless steel construction, attached heat shield, and OE-style connection points support a reliable replacement for the listed Buick applications.
Dorman 679-543 Catalytic Converter - Rear
OE-Style Rear Catalytic Converter
This Dorman catalytic converter, part number 679-543, is built for specific rear exhaust applications and follows the original equipment fit and function for a direct replacement. It is a specific-fit, standard replacement unit for 2010-2011 Buick LaCrosse and 2010 Buick Allure rear positions.
With a stainless steel body, ceramic substrate, flanged inlet and outlet, and attached heat shield, this converter is built for a clean OE-style installation on the listed vehicles. Dorman 679-543 also includes the required gaskets and outlet mounting hardware noted in the product data.
Key Features
- Specific-fit catalytic converter for rear exhaust placement
- Fits 2010-2011 Buick LaCrosse, rear
- Fits 2010 Buick Allure, rear
- Stainless steel body with natural finish
- Ceramic substrate for exhaust aftertreatment service
- Flanged inlet and flanged outlet for OE-style connection points
- Heat shield attached
- Inlet gasket and outlet gasket listed in the product data
- Standard replacement grade
Detailed Description
Dorman 679-543 is a rear catalytic converter engineered for direct replacement on the listed Buick applications. The unit uses a stainless steel cylinder-style body with a ceramic substrate, flanged inlet and outlet, and a 70 mm outlet outside diameter. Its specific-fit design supports OE-style alignment on 2010-2011 Buick LaCrosse and 2010 Buick Allure rear exhaust systems. This part cross-references AP Exhaust 644143 and Eastern Catalytic 50578 for the same application.
Common Repair Applications
- Replacement for a damaged or restricted rear catalytic converter
- Restores proper exhaust flow on a Buick LaCrosse rear exhaust system
- Addresses emissions-related fault conditions tied to converter efficiency
- Replaces a rusted or leaking OE converter assembly
- Supports repair of exhaust noise caused by a failing converter housing or flange seal
Installation Notes
Verify the rear position, flange style, inlet and outlet dimensions, and vehicle year before installation. This converter is specific to the listed Buick models, so match the original exhaust layout and mounting points during removal and installation. Use the included gaskets and outlet mounting hardware as specified in the product data, and confirm all flange surfaces are clean and flat before tightening.
Quality Assurance
Dorman designs this converter to match original equipment fit and function on the specified vehicles. The stainless steel construction, attached heat shield, and OE-style connection points support a reliable replacement for the listed Buick applications.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
OE-Style Rear Catalytic Converter
This Dorman catalytic converter, part number 679-543, is built for specific rear exhaust applications and follows the original equipment fit and function for a direct replacement. It is a specific-fit, standard replacement unit for 2010-2011 Buick LaCrosse and 2010 Buick Allure rear positions.
With a stainless steel body, ceramic substrate, flanged inlet and outlet, and attached heat shield, this converter is built for a clean OE-style installation on the listed vehicles. Dorman 679-543 also includes the required gaskets and outlet mounting hardware noted in the product data.
Key Features
- Specific-fit catalytic converter for rear exhaust placement
- Fits 2010-2011 Buick LaCrosse, rear
- Fits 2010 Buick Allure, rear
- Stainless steel body with natural finish
- Ceramic substrate for exhaust aftertreatment service
- Flanged inlet and flanged outlet for OE-style connection points
- Heat shield attached
- Inlet gasket and outlet gasket listed in the product data
- Standard replacement grade
Detailed Description
Dorman 679-543 is a rear catalytic converter engineered for direct replacement on the listed Buick applications. The unit uses a stainless steel cylinder-style body with a ceramic substrate, flanged inlet and outlet, and a 70 mm outlet outside diameter. Its specific-fit design supports OE-style alignment on 2010-2011 Buick LaCrosse and 2010 Buick Allure rear exhaust systems. This part cross-references AP Exhaust 644143 and Eastern Catalytic 50578 for the same application.
Common Repair Applications
- Replacement for a damaged or restricted rear catalytic converter
- Restores proper exhaust flow on a Buick LaCrosse rear exhaust system
- Addresses emissions-related fault conditions tied to converter efficiency
- Replaces a rusted or leaking OE converter assembly
- Supports repair of exhaust noise caused by a failing converter housing or flange seal
Installation Notes
Verify the rear position, flange style, inlet and outlet dimensions, and vehicle year before installation. This converter is specific to the listed Buick models, so match the original exhaust layout and mounting points during removal and installation. Use the included gaskets and outlet mounting hardware as specified in the product data, and confirm all flange surfaces are clean and flat before tightening.
Quality Assurance
Dorman designs this converter to match original equipment fit and function on the specified vehicles. The stainless steel construction, attached heat shield, and OE-style connection points support a reliable replacement for the listed Buick applications.
