Walker 84779 Catalytic Converter - Left

Overview

Walker CalCat 84779 is a direct-fit catalytic converter built for specific applications and engineered to meet CARB compliance requirements. It uses a stainless steel body, ceramic substrate, and a round design for OE-style fit and function.

This part number 84779 is listed for Chevrolet, GMC truck and SUV applications, including Silverado 1500, Sierra 1500, Suburban, Tahoe, Yukon, and Yukon XL coverage in the fitment data.

Key Features

• Direct-fit catalytic converter with specific application coverage
• CARB certified for regulated emissions applications
• Stainless steel body with ceramic substrate
• Round body shape with ball outlet design
• Pre- and post-converter oxygen sensor ports
• Walker CalCat product line for OE-style fitment

Detailed Description

Walker CalCat 84779 is designed, tested, and validated for compliance-focused replacement use where CARB certification is required. The converter assembly uses three converter bodies, four sensor ports, and OE-style inlet and outlet configurations to match the listed applications. Part number 84779 is a fitment-specific solution for Chevrolet Silverado 1500 and GMC Sierra 1500 trucks, along with Chevrolet Suburban, Tahoe, GMC Yukon, and Yukon XL models shown in the fitment table.

The CalCat line is Walker’s direct-fit emissions product family, built for vehicles that need a precise replacement rather than a universal converter. This part cross-references AP Exhaust 774384 for the same application.

What It Helps Solve

• Failed emissions testing caused by a worn or inefficient converter
• Check engine light concerns related to catalyst efficiency codes
• Exhaust restriction from a deteriorated internal substrate
• Fitment issues from using a universal converter on a specific application

Installation Notes and Tips

Verify the vehicle’s emissions requirements before ordering, since this converter is CARB certified and application-specific. Confirm inlet style, outlet style, and oxygen sensor port count against the existing exhaust layout. Installation hardware is not included unless explicitly stated in the product data.

Quality Assurance

Walker states that CalCat direct-fit catalytic converters are designed, tested, and validated to meet CARB standards and deliver OE-style fitment for the listed applications.