The sixth gen Camaro is available with an optional dual mode exhaust (code NPP) so you can change the exhaust noise. With the MRT exhaust installed, your car will be FULL TIME COOL with a deep muscle car sound that you can always hear!! Essentially, the MRT exhaust system replaces the full exhaust OE tube. During installation, we suggest adding an MRT Power Plate to connect to the active exhaust valve motor so that the check engine light is not activated