I just got a used 2.2 off the market, it is an older unit that has been upgraded to the new snout (the port on the body is blocked, and theres no port on the snout). It has the bolt with the vent hole in the middle... Billetflow has 3 different style of pulley hubs for Kenne Bell blowers... does anyone know right offhand what the proper snout is? I'll upload a picture of the diagram here shortly... Thanks!