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™ System. This 2.75" diameter performance Merge X-Pipe creates power while adding a great sound. Built from premium T-304 austenitic stainless steel, superior to T-400 series (such as 409), to give you the absolute best in performance and durability .Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all it comes with the BORLA® Million Mile Warranty.