Does anyone know the diameter of the y-pipe outlet that comes with this exhaust? I've been searching everywhere and cannot find any specs. The previous owner of my g37 coupe put this exhaust on the car and I'm planning on going to a single exit but don't know if the outlet of the y-pipe on this exhaust is 3-inches. Any help is appreciated thanks.

 

Sorry, don't know off hand but when I was researching I had luck emailing Stillen.