Dorman 674-487 Catalytic Converter - Rear

Reliable Catalytic Converter for Nissan Altima, Maxima, and Quest

The Dorman 674-487 catalytic converter is designed specifically for select Nissan models, including the Altima, Maxima, and Quest. Engineered to meet standard replacement requirements, this catalytic converter ensures proper exhaust flow and emission control for your vehicle.

Key Features of the Dorman 674-487 Catalytic Converter

• Specific fit for Nissan Altima, Maxima, and Quest models
• Stainless steel body material for durability and corrosion resistance
• Cylindrical body shape with a 4-inch length and 4-inch width
• Flanged inlet and outlet connections with 1.8-inch inlet and 2.25-inch outlet outside diameters
• Silicon carbide substrate for effective catalytic conversion
• Includes inlet and outlet gaskets for proper sealing
• Equipped with one sensor port for oxygen sensor compatibility
• Standard replacement grade type for reliable performance

Detailed Product Description

The Dorman 674-487 catalytic converter features a stainless steel cylindrical body measuring 4 inches in length and width, designed to fit specific Nissan vehicles such as the Altima, Maxima, and Quest. Its flanged inlet and outlet connections provide secure mounting points, with the inlet inside diameter at 1.8 inches and the outlet outside diameter at 2.25 inches, ensuring proper exhaust flow. The silicon carbide substrate material is engineered to reduce harmful emissions effectively while maintaining engine performance. This converter includes both inlet and outlet gaskets to ensure a tight seal and prevent exhaust leaks. Additionally, it has one sensor port to accommodate the vehicle’s oxygen sensor, maintaining accurate emission monitoring.

Common Applications and Issues Addressed

• Replacement for damaged or clogged catalytic converters on Nissan Altima, Maxima, and Quest
• Helps resolve check engine light issues related to catalytic converter failure
• Improves exhaust emissions to meet regulatory standards (note: not CARB certified)
• Restores proper exhaust flow and engine efficiency
• Reduces exhaust noise caused by converter damage

Installation Notes and Tips

Installation of the Dorman 674-487 catalytic converter requires proper alignment of the flanged inlet and outlet connections. Ensure that the included inlet and outlet gaskets are positioned correctly to prevent exhaust leaks. This part is designed for specific Nissan models, so verify vehicle compatibility before installation. The converter includes mounting hardware for the outlet side; however, inlet mounting hardware is not included and may need to be sourced separately. Professional installation is recommended to ensure proper fit and function.

Quality Assurance and Warranty

This catalytic converter is manufactured to meet standard replacement grade specifications, providing reliable performance for Nissan Altima, Maxima, and Quest vehicles. While it is not California Air Resources Board (CARB) certified, it is constructed with durable stainless steel and a silicon carbide substrate to maintain long-term durability. Warranty details should be confirmed with the product provider or manufacturer.