Walker 14739 Catalytic Converter with Integrated Exhaust Manifold - Right

Product Overview

Walker EPA 14739 is a specific-fit catalytic converter with integrated exhaust manifold built for EPA-compliant replacement on select Nissan and INFINITI applications. It uses a stainless steel body, ceramic substrate, and a direct-fit flange design to match the original exhaust layout.

This part fits 2016-2021 INFINITI QX80, right; 2017-2021 Nissan Armada, right; 2017-2021 Nissan NV2500, right; 2017-2021 Nissan NV3500, right; 2017-2021 Nissan TITAN XD, right; and 2017-2020 Nissan TITAN, right. Part number 14739 is part of Walker Ultra Direct-Fit Catalytic Converters, a line focused on EPA-compliant replacement for import and domestic OBDII vehicles.

Key Features

• Specific-fit catalytic converter with integrated exhaust manifold
• EPA-compliant design for OBDII vehicles
• Stainless steel body and stainless steel heat shield
• Ceramic ECO III substrate for exhaust aftertreatment
• 8-bolt welded inlet flange and 2-bolt welded outlet flange
• Heat shield attached, with inlet and outlet gaskets included
• One pre-converter oxygen sensor port

Detailed Description

Walker 14739 is engineered as a direct-fit replacement for applications that use an integrated manifold and catalytic converter assembly. The round converter body measures 5.500 inches in length with an overall length of 33.00 inches, and the welded flange connections help maintain the original exhaust routing and sealing points. The ceramic substrate and stainless steel construction support consistent exhaust flow and durability in a replacement exhaust system.

For buyers servicing a Nissan Armada, Nissan TITAN, or INFINITI QX80, this part number 14739 provides a fitment-specific solution that matches the right-side EPA application listed in the catalog. The Walker EPA line is positioned for compliant replacement on 1996-and-newer OBDII vehicles, and this unit includes the attached heat shield plus the required gaskets for the inlet and outlet connections.

This part cross-references AP Exhaust 641593 for the same application.

What It Is Used For

• Replacing a worn or failed catalytic converter assembly
• Restoring exhaust sealing at the manifold and flange connections
• Addressing catalyst efficiency concerns in the exhaust system
• Repairing heat shield damage or corrosion around the converter body
• Servicing EPA application-specific exhaust emissions components

Installation Notes and Tips

Verify the right-side fitment and flange configuration before installation. Confirm the pre-converter oxygen sensor port location and match the inlet and outlet gasket surfaces to the existing exhaust system. Because this assembly uses welded flange connections and integrated manifold construction, proper alignment during installation is important for sealing and exhaust fit.

Quality Assurance

Walker Ultra Direct-Fit Catalytic Converters are built to meet EPA standards and are intended for compliant replacement on listed OBDII applications. Part number 14739 is a premium-grade replacement in the Walker EPA line.