Dorman 674-045 Catalytic Converter with Integrated Exhaust Manifold - Front

Overview of Dorman Catalytic Converter with Integrated Exhaust Manifold

The Dorman 674-045 catalytic converter with integrated exhaust manifold is designed specifically for Buick Allure and LaCrosse models. This natural-colored, stainless steel converter offers a reliable replacement option for exhaust system repairs.

• Compatible with Buick Allure and LaCrosse vehicles
• Constructed from durable stainless steel for corrosion resistance
• Includes one inlet and one outlet with flanged outlet type
• Comes with inlet gasket and outlet mounting hardware
• Features two sensor ports for oxygen sensors
• Overall length of 16 inches with a 4-inch converter body length
• Oval-shaped inlet port with four mounting holes
• Not California Air Resources Board (CARB) certified

Product Details and Specifications

The Dorman 674-045 catalytic converter integrates the exhaust manifold and converter body into a single unit, simplifying installation and improving exhaust flow. Made from stainless steel, it resists rust and corrosion, extending the service life of the exhaust system. The converter features a 4-inch body length and an overall length of 16 inches, designed to fit precisely on Buick Allure and LaCrosse models. It includes one oval-shaped inlet port with four mounting holes and one flanged outlet with two mounting holes. Two sensor ports accommodate oxygen sensors, ensuring proper emissions monitoring. The package contains an inlet gasket and outlet mounting hardware to assist with installation.

Common Applications and Problem Resolution

• Replacement for damaged or rusted catalytic converters on Buick Allure and LaCrosse
• Restores proper exhaust flow and reduces harmful emissions
• Addresses exhaust leaks caused by manifold or converter cracks
• Helps resolve check engine light issues related to catalytic converter failure
• Improves engine performance affected by clogged or failing converters

Installation Notes and Tips

Ensure the vehicle is cooled down before beginning installation. The Dorman 674-045 includes the inlet gasket and outlet mounting hardware, but additional mounting hardware for the inlet is not included and may need to be sourced separately. Properly torque all mounting bolts to manufacturer specifications to prevent exhaust leaks. Verify oxygen sensor connections to the two sensor ports for accurate emissions control. This part is not CARB certified, so confirm local regulations before installation.

Quality Assurance and Warranty

Dorman catalytic converters are manufactured to meet or exceed OEM standards for fit and function. The stainless steel construction provides durability against corrosion and heat. While this product is not CARB certified, it is designed for reliable performance on compatible Buick Allure and LaCrosse models. Warranty details should be confirmed with the distributor or manufacturer.