Fits vehicles With or WITHOUT AFM Valves and / or NPP Valves. Borla(r) 2.75" diameter Merge X-Pipe 60548 works perfectly between the factory catalytic converters and Borla(r) Axle-Back systems on all C7 Corvettes including Stingray, Grand Sport, and Z06 models. This performance 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, they come with the Borla(r) Million-Mile Warranty