Walker 16668 Catalytic Converter

Walker EPA Direct-Fit Catalytic Converter

Walker EPA Part Number 16668 is a direct-fit catalytic converter built for specific applications on Nissan Frontier and Suzuki Equator models. It is designed for OBDII vehicles and uses a stainless steel body with a ceramic substrate for a factory-style replacement on the rear converter position.

The Walker EPA Ultra Direct-Fit line is focused on application-specific exhaust replacement for import and domestic vehicles, with EPA-compliant design for federal-emissions use. For 2005-2018 Nissan Frontier and 2009-2012 Suzuki Equator applications, this converter follows the original flange layout for a direct installation path.

Key Features

• Direct-fit catalytic converter for specific vehicle applications
• Walker EPA line for federal-emissions replacement use
• Stainless steel body with ceramic substrate material
• Rear converter position with 3-bolt welded flange inlet and 2-bolt welded flange outlet
• Designed for OBDII vehicles, including 1996 and newer applications
• Fits 2005-2018 Nissan Frontier, rear
• Fits 2009-2012 Suzuki Equator, rear
• Part number 16668 for application matching and catalog lookup

Detailed Description

Walker 16668 is a specific-fit catalytic converter engineered for rear exhaust placement on select Nissan Frontier and Suzuki Equator vehicles. The round stainless steel body measures approximately 4 inches in height and width with an 8-inch body length, and the overall length is listed at 35.125 to 35.500 inches. The unit uses a ceramic substrate and pre-catalyst oxygen sensor location, matching the needs of the listed emissions applications.

This part cross-references Monroe Shocks & Struts 172286 and 182286 for the same application. It is a practical replacement choice for drivers searching for a 2012 Nissan Frontier catalytic converter, a 2005-2018 Nissan Frontier rear converter, or a 2009-2012 Suzuki Equator exhaust replacement. Part number 16668 is also associated with interchange reference 644135.

What It Helps Address

• Check engine light concerns related to catalyst efficiency codes
• Restricted exhaust flow from a worn or damaged converter
• Failed emissions inspection on federal-emissions vehicles
• Exhaust noise or odor caused by a deteriorated converter core
• Replacement needs after corrosion or internal substrate breakdown

Installation Notes and Tips

Use the listed fitment details to confirm year, make, model, and rear converter position before ordering. For 2005-2018 Nissan Frontier and 2009-2012 Suzuki Equator applications, an exhaust gasket is recommended, and additional parts 31576 and 31540 are noted as needed to complete installation. This converter uses a 3-bolt welded flange inlet and 2-bolt welded flange outlet, so matching the existing exhaust connection style is important.

Fitment notes state that this part is not legal for sale or use in California and other CARB-compliant states. It is legal in New York and Maine only on EPA federal-emission-equipped vehicles. Verify local emissions requirements before installation.

Quality Assurance

Walker EPA catalytic converters are built to meet EPA standards for approved federal-emissions applications. Package contents include an installer card and warranty card for reference during installation and product registration.