Chevy Says Don’t Add This System
This bulletin applies to 2014-2019 Chevy Corvette models. A customer may inquire if Chevrolet’s dual mode performance exhaust system (OEM option code RPO NPP) can be added to a Stingray that was originally produced without the option.
According to Chevy, DO NOT attempt to add this system to a vehicle that was not manufactured with it. General Motors does not support the software changes that are required.