Walker 83457 Catalytic Converter - Right

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat 83457 is a direct-fit catalytic converter built for specific vehicle applications that require CARB-compliant replacement emissions equipment. It is designed for an OE-style fit and is available for OBDII and non-OBD vehicles, with coverage that includes select GMC Sierra 1500 and GMC Yukon applications.

Walker CalCat is the product line focused on CARB standards compliance and direct-fit replacement geometry. For buyers searching for a catalytic converter for a 2001-2006 GMC Sierra 1500 right side or a 2001-2006 GMC Yukon right side, this line is built around precise fitment and emissions legality where listed.

• Direct-fit catalytic converter for specific applications
• CARB certified for listed California and CARB-state applications
• Stainless steel body with ceramic substrate
• 3-bolt welded flange inlet and 2-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor location
• Round body design with OE-style dimensions
• Walker part number 83457 for catalog and fitment lookup

Detailed Product Overview

This catalytic converter is engineered for right-side exhaust placement on listed Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Silverado 1500 Classic, Chevrolet Suburban 1500, GMC Sierra 1500 Classic, GMC Sierra 1500, GMC Yukon, and GMC Yukon XL 1500 applications. The stainless steel housing and ceramic substrate are specified for regular-grade replacement use, while the direct-fit layout helps maintain factory-style exhaust routing and sensor placement. Walker 83457 is also cross-referenced to 4451421 for the same application.

What It Helps Address

• Check engine light concerns related to catalyst efficiency codes on listed vehicles
• Failed emissions inspection on CARB-regulated applications
• Damaged or restricted factory catalytic converter housing
• Exhaust leaks at the converter connection points on listed fitments
• Replacement needs for right-side converter service on GM full-size SUVs and trucks

Installation Notes and Tips

Verify the engine family number, model year, and right-side fitment before ordering. Some listed applications require additional part 31610 to complete installation, and an exhaust gasket is recommended on certain Colorado-specific 2001-2007 applications. Use the specified 3-bolt welded flange inlet and 2-bolt welded flange outlet connections, and confirm oxygen sensor locations before installation.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the applications shown. This part carries CARB Executive Order D-182-69 for the listed fitments and is approved only where the vehicle and state requirements match the catalog notes.

Compatible Vehicles

• Fits 2007 Chevrolet Silverado 1500 Classic, right
• Fits 2007 GMC Sierra 1500 Classic, right
• Fits 2006 Cadillac Escalade, right
• Fits 2006 Cadillac Escalade ESV, right
• Fits 2006 Cadillac Escalade EXT, right
• Fits 2006 Chevrolet Suburban 1500, right
• Fits 2006 GMC Sierra 1500, right
• Fits 2006 GMC Yukon, right
• Fits 2006 GMC Yukon XL 1500, right
• Fits 2005 Cadillac Escalade, right
• Fits 2005 Cadillac Escalade ESV, right
• Fits 2005 Cadillac Escalade EXT, right
• Fits 2005 GMC Sierra 1500, right
• Fits 2005 GMC Yukon, right
• Fits 2005 GMC Yukon XL 1500, right
• Fits 2004 Cadillac Escalade, right
• Fits 2004 Cadillac Escalade ESV, right
• Fits 2004 Cadillac Escalade EXT, right
• Fits 2004 GMC Sierra 1500, right
• Fits 2004 GMC Yukon, right
• Fits 2004 GMC Yukon XL 1500, right
• Fits 2003 Cadillac Escalade, right
• Fits 2003 Cadillac Escalade ESV, right
• Fits 2003 Cadillac Escalade EXT, right
• Fits 2003 GMC Sierra 1500, right
• Fits 2003 GMC Yukon, right
• Fits 2003 GMC Yukon XL 1500, right
• Fits 2002 Cadillac Escalade, right
• Fits 2002 Cadillac Escalade EXT, right
• Fits 2002 GMC Sierra 1500, right
• Fits 2002 GMC Yukon, right
• Fits 2002 GMC Yukon XL 1500, right
• Fits 2001 GMC Sierra 1500, right
• Fits 2001 GMC Yukon, right
• Fits 2001 GMC Yukon XL 1500, right