AP Exhaust 772797 Catalytic Converter - Rear

CARB-Compliant Rear Catalytic Converter

AP Exhaust 772797 is a direct-fit rear catalytic converter built for California emissions applications on select Buick LaCrosse and Chevrolet Impala models. It uses a stainless steel body, a ceramic substrate, and OE-style 2-bolt welded inlet and outlet connections for a precise replacement on the rear exhaust position.

The CGMXJ03.6166 product line is engineered around exact OE dimensions and fitment, with manufacturing processes that support consistent converter construction and repeatable installation. For shoppers searching for a rear catalytic converter for 2012-2017 Buick LaCrosse or Chevrolet Impala California applications, part number 772797 is the direct-fit option to review.

Key Features

• CARB compliant direct-fit catalytic converter
• Executive Order D-798-9 for California emissions applications
• Stainless steel body construction
• Ceramic substrate material
• 2-bolt welded inlet and outlet connections
• Overall length: 55.25 inches
• No O2 sensor ports
• Outlet gasket included

Product Details

AP Exhaust 772797 is a rear catalytic converter for California emissions-equipped vehicles, including Fits 2017 Chevrolet Impala, rear; Fits 2016 Chevrolet Impala, rear; Fits 2015 Chevrolet Impala, rear; Fits 2014 Chevrolet Impala, rear; and Fits 2012 Buick LaCrosse, rear. It also covers Fits 2016 Buick LaCrosse, rear; Fits 2015 Buick LaCrosse, rear; Fits 2014 Buick LaCrosse, rear; and Fits 2013 Buick LaCrosse, rear. The direct-fit design follows OE dimensions to support proper exhaust alignment and factory-style installation.

This part cross-references AP Exhaust CGMXJ03.6166 for the same application.

Common Replacement Reasons

• Failed emissions test or catalyst efficiency fault
• Check engine light related to rear catalyst performance
• Damaged or corroded rear converter assembly
• Exhaust restriction or rattling from a worn substrate
• Need for a California-compliant replacement on the listed vehicles

Installation Notes

Verify the vehicle’s emissions configuration, rear position, and OE reference before installation. This converter uses 2-bolt welded inlet and outlet connections and does not include inlet hardware. The unit has no O2 sensor ports, so confirm sensor placement on the vehicle before beginning the repair.

Quality Assurance

AP Exhaust uses advanced manufacturing methods, including automated workstations, spinner welding equipment, and high-speed production lines, to build converters to OE dimensions and fitment standards. The ARISTO substrate chemistry is used to support efficient catalyst loading and consistent converter performance.