Dorman 674-260 Catalytic Converter with Integrated Exhaust Manifold

Overview of Dorman Catalytic Converter with Integrated Exhaust Manifold

The Dorman 674-260 catalytic converter with integrated exhaust manifold is designed specifically for Mazda 3 and Mazda 3 Sport models. This natural-colored, stainless steel converter offers a reliable replacement option for exhaust system repairs requiring a combined manifold and catalytic converter assembly.

• Compatible with Mazda 3 and Mazda 3 Sport vehicles
• Constructed from durable stainless steel for corrosion resistance
• Converter body length of 5 inches with an overall length of 32 inches
• Features one inlet and one outlet with flanged outlet type
• Includes inlet gasket and outlet mounting hardware for installation
• Equipped with two sensor ports for oxygen sensors
• Inlet port shape is round with seven inlet mounting holes and two outlet mounting holes
• Grade type: Regular, not CARB certified

Product Details and Specifications

The Dorman 674-260 catalytic converter integrates the exhaust manifold and catalytic converter into a single unit, simplifying replacement on compatible Mazda 3 and Mazda 3 Sport models. The converter body is made from stainless steel, providing durability and resistance to heat and corrosion. The natural finish maintains a clean appearance while withstanding harsh exhaust conditions. This part features a 5-inch converter body length and an overall length of 32 inches, designed to fit precisely within the exhaust system layout of the specified vehicles.

The inlet has a round port shape with seven mounting holes, ensuring a secure fit to the engine exhaust ports. The outlet is flanged with two mounting holes and includes the necessary mounting hardware for attachment. Two sensor ports accommodate oxygen sensors, maintaining proper emissions monitoring and engine performance. The package includes an exhaust manifold, one manifold gasket, one flange gasket, and two studs to assist with installation.

Common Applications and Problem Resolution

• Replacement of damaged or cracked exhaust manifold and catalytic converter assembly
• Restoring proper exhaust flow and emissions control on Mazda 3 and Mazda 3 Sport vehicles
• Addressing exhaust leaks caused by manifold gasket failure
• Resolving check engine light issues related to catalytic converter or oxygen sensor faults
• Improving engine performance by ensuring proper exhaust backpressure and emissions compliance

Installation Notes and Tips

When installing the Dorman 674-260 catalytic converter with integrated exhaust manifold, ensure all old gaskets and mounting surfaces are thoroughly cleaned to prevent exhaust leaks. The included inlet gasket should be used to maintain a proper seal. While outlet mounting hardware is included, inlet mounting hardware is not, so verify you have the necessary bolts or studs for the inlet side. Proper torque specifications should be followed to avoid warping or damage to the manifold. The two sensor ports require correct oxygen sensor installation to maintain emissions system functionality.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. This catalytic converter with integrated exhaust manifold is constructed from stainless steel to provide long-lasting durability. Although this part is not California Air Resources Board (CARB) certified, it is designed to meet regular grade emissions requirements. Warranty coverage details should be confirmed with the distributor or manufacturer at the time of purchase.