Owners of 2020–2025 Corvettes may install an aftermarket exhaust system on their vehicle in an effort to change the performance characteristics or look of the system. However, a number of exhaust-related DTCs may set due to an aftermarket system, resulting in drivability concerns and calls to the Technical Assistance Center (TAC) with questions about the proper operation of the system.

When diagnosing the exhaust system on the C8 Corvette, begin by checking if the system has been modified with any aftermarket equipment.
OEM System
The Original Equipment Manufacturer (OEM) exhaust system on the Corvette Stingray is designed to meet performance specifications and deliver specific exhaust tuning. The OEM system is available with polished or black-colored exhaust tips.
It also has a matte-black-colored heat shield around the body of the muffler.

GM Accessory System

The GM Accessory exhaust system for the Corvette is manufactured by Borla.
It is offered with exhaust tips that are polished stainless steel, black Physical Vapor Deposition (PVD) coating or carbon fiber.
The GM Accessory kit can be identified by the slightly golden-colored tint of the heat shield.

If the GM Accessory original box is not available as proof of installation, ask the customer to provide the invoice or receipt with the part number clearly visible.
If there are any conditions related to the GM Accessory system, contact Borla for technical assistance.

Other Systems

GM does not support any other aftermarket exhaust systems for the Corvette.
Other than the GM Accessory Borla system, all other kits are considered aftermarket systems and

GM will not cover any diagnosis/repairs or parts/labor costs associated with the exhaust system.

To address any conditions that may be related to the exhaust system, the customer has the option to have the dealership return the exhaust system to the original stock system, return the vehicle to the company that installed the aftermarket system, or have the GM Accessory Borla system installed on the vehicle. These are customer-paid options.

If there are any questions about the exhaust system, it’s recommended to create a TAC case and attach quality photographs of the system.
Refer to Bulletin #23-NA-103 for instructions on submitting photos to TAC.

For more details about aftermarket exhaust systems, refer to #PIC6581.