Dorman 673-642 Catalytic Converter with Integrated Exhaust Manifold

Overview of Dorman Catalytic Converter with Integrated Exhaust Manifold

The Dorman 673-642 catalytic converter with integrated exhaust manifold is designed specifically for Lexus GS300 and IS300 models. This natural-colored, stainless steel converter meets California Air Resources Board (CARB) standards, ensuring compliance and reliable emissions control.

• Compatible with Lexus GS300 and IS300 vehicles
• Constructed from durable stainless steel for long-lasting performance
• CARB certified with Executive Order Number D-665-23
• Includes inlet gasket and outlet flange for proper sealing
• Features three outlet mounting holes for secure installation
• Regular grade catalytic converter with an irregular inlet port shape

Product Details and Specifications

The Dorman 673-642 catalytic converter integrates the exhaust manifold and converter body into a single unit, simplifying replacement and improving fitment accuracy. Its stainless steel construction resists corrosion and withstands high temperatures common in exhaust systems. The natural finish maintains the integrity of the material without additional coatings. This converter is CARB certified, meeting strict emissions standards required in California and other states that follow CARB regulations. The included inlet gasket and outlet flange ensure a proper seal during installation, while the three outlet mounting holes provide secure attachment points. The irregular inlet port shape is designed to match the specific exhaust port configuration of the Lexus GS300 and IS300 models.

Applications and Common Issues Addressed

• Replacement for damaged or clogged catalytic converters on Lexus GS300 and IS300
• Restores proper exhaust flow and emissions control
• Resolves check engine light issues related to catalytic converter failure
• Helps pass state emissions inspections requiring CARB-compliant parts
• Eliminates exhaust leaks caused by manifold or converter damage

Installation Notes and Tips

When installing the Dorman 673-642 catalytic converter with integrated exhaust manifold, ensure the inlet gasket is properly seated to prevent exhaust leaks. The three outlet mounting holes should align with the vehicle’s exhaust system for secure attachment. Due to the integrated design, this part replaces both the exhaust manifold and catalytic converter, so removal of the old assembly should be done carefully to avoid damage to surrounding components. It is recommended to inspect related exhaust system parts during installation for wear or damage.

Quality Assurance and Certification

This catalytic converter is CARB certified under Executive Order Number D-665-23, confirming it meets emissions standards for Lexus GS300 and IS300 vehicles. Manufactured with stainless steel, it offers durability and resistance to corrosion and heat. While no specific warranty information is provided, Dorman products typically adhere to industry quality standards to ensure reliable performance.