Since the release of the C8 we have installed many different variations of aftermarket exhaust systems. The Borla line has been our “go to” exhaust for Corvettes for 20 years and there C8 systems are by far the best quality out there! The C8 utilizes two sets of electronically controlled valves. Two are for the Active Fuel Management (AFM) and the other are rear valves used on the NPP exhaust. These valves are quite intricate and Borla has them engineered right!