Borla 2014 Chevy Corvette Stingray X-Pipes (Smog Legal Cut and Clamp)Installation REQUIRES cutting the Original Equipment (O. E.) exhaust system. Cut and clamp behind the secondary catalytic converters. Fits vehicles with or without AFM valves and or NPP valves (dual mode exhaust). The BORLA 60548 X Pipe works perfectly between the factory catalytic converters and BORLA Axle Back systems on all C7 Corvettes including Stingray, Grand Sport, and Z06 models. When combined with an Axle Back system it creates a Cat Back