Borla 2016 Chevy Camaro SS 6.2L Dual NPP Tip AdaptersThese 2. 75" diameter Tail Pipes are intended to add the Dual Mode Exhaust (NPP) valves to Borla(r) systems 11920, 11921, 11926, 11927, 140687, and 140688 that did not come with NPP valves. They feature single 4" round polished T 304 stainless steel tips on each tail pipe (2 tail pipes included in this kit). They can ONLY be used with Borla(r) mufflers that have dual tips exiting the mufflers. These pipes replace the outside tail pipe on each muffler.