OE Quality
60-Day Returns

Dorman 673-818 Catalytic Converter with Integrated Exhaust Manifold - Right
Reliable Catalytic Converter with Integrated Exhaust Manifold
The Dorman 673-818 catalytic converter with integrated exhaust manifold is designed to meet emissions standards while providing a durable replacement for Nissan Frontier and Xterra models. This natural-colored converter offers a precise fit and quality materials to ensure long-lasting performance.
- Compatible with Nissan Frontier and Nissan Xterra vehicles
- CARB certified with Executive Order Number D-798 for California emissions compliance
- Constructed from cast iron and stainless steel for durability
- Includes inlet gasket and mounting hardware for secure installation
- Features one inlet and one outlet with flanged outlet type
- Equipped with two sensor ports for oxygen sensors
- Overall length of 18 inches and converter body length of 8 inches
- Inlet port is round with 8 mounting holes; outlet has 3 mounting holes
Product Details and Specifications
The Dorman 673-818 catalytic converter integrates the exhaust manifold and converter body into a single unit, simplifying replacement on compatible Nissan Frontier and Xterra models. Its natural finish and regular grade type construction combine cast iron and stainless steel materials to withstand high temperatures and corrosive exhaust gases. The converter features a flanged outlet and a round inlet port, designed with multiple mounting holes (8 on the inlet and 3 on the outlet) to ensure a secure fit. Two sensor ports accommodate oxygen sensors, maintaining proper engine management and emissions control. The package includes an inlet gasket and mounting hardware to facilitate installation.
Common Applications and Problem Resolution
- Replaces faulty or clogged catalytic converters causing poor emissions performance
- Addresses exhaust leaks at the manifold or converter connection points
- Restores proper oxygen sensor readings for engine efficiency
- Meets California Air Resources Board (CARB) requirements for emissions compliance
- Eliminates rattling or damage from cracked or broken exhaust manifolds
Installation Notes and Tips
When installing the Dorman 673-818 catalytic converter with integrated exhaust manifold, ensure all mounting surfaces are clean and free of debris. Use the included inlet gasket and mounting hardware to secure the unit firmly. Verify oxygen sensor placement in the two sensor ports to maintain accurate emissions monitoring. Proper torque specifications should be followed to prevent exhaust leaks and ensure a tight seal. This part is designed specifically for Nissan Frontier and Xterra models, so confirm vehicle compatibility before installation.
Quality Assurance and Certification
This catalytic converter with integrated exhaust manifold is CARB certified under Executive Order Number D-798, ensuring compliance with California emissions standards. Manufactured with durable cast iron and stainless steel materials, it is engineered to provide reliable performance and longevity. The part number 673-818 corresponds to a direct-fit replacement designed to meet or exceed OEM specifications for Nissan Frontier and Xterra vehicles.
| Brand | Dorman |
| Part Number | 673-818 |
| Color | Natural |
| Grade Type | Regular |
| Converter Body Length | 8 |
| Outlet Type | Flanged |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| California Air Resources Board (CARB) Certified | Yes |
| Inlet Mounting Hole Quantity | 8 |
| Inlet Gasket Included | Yes |
| Inlet Mounting Hardware Included | Yes |
| Outlet Mounting Hole Quantity | 3 |
| Outlet Mounting Hardware Included | Yes |
| Overall Length | 18 |
| Air Tube Count | 0 |
| Sensor Port Count | 2 |
| Converter Body Material | Cast iron/stainless steel |
| CARB Executive Order Number | D-798 |
| Inlet Port Shape | Round |
| Package Contents | 1 exhaust manifold; 1 inlet gasket; 1 outlet gasket; 10 bolts; 3 |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2004 | Nissan | Xterra | 3.3L | V6 | Right | CARB Compliant: Yes; CARB Compliant: Yes |
| 2003 | Nissan | Xterra | 3.3L | V6 | Right | CARB Compliant: Yes; CARB Compliant: Yes |
| 2002 | Nissan | Frontier | 3.3L | V6 | Right | CARB Compliant: Yes; CARB Compliant: Yes |
| 2002 | Nissan | Xterra | 3.3L | V6 | Right | CARB Compliant: Yes; CARB Compliant: Yes |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.