#2 looks like the coolant neck from a DOHC engine. It's hard to tell in the pic, but the SOHC piece is plastic and the metal doesn't come out of the block like that.
almost looks like from a 2gn Dohc, but I could be mistaken...
-Sean 01 Dodge Neon MSII 2.0 DOHC turbo, '13 Dodge Dart Mopar Edition 1.4 Multi-Air turbo
Nos is a lot like a hot chick with std's you wanna hit it but are afraid of the consequences.