alright, so i just bought the 3" pvc. in the directions it says use black rtv to mount it to the box. what else can i use because i cant seem to find black rtv anywhere? ALSO, what have people used on the ends of their intake to make it trumpeted (bad word i suppose, but you know what i mean. kind of bell shaped) at the end? could i just get one of those 3"-4" rubber adapters or even the pvc adapter and stick it on the end and smooth it out? just wanted some quick opinions so i can do this tonight!