I have attached a pic of this piece, it is some type of splitter and has cracked causing the 3.8 to run like crap and die. Can anyone tell me the "proper: name of this piece or where i can get a new one? I have tape around the one i need.

Any help or suggestions would be greatly appreciated

The piece i need identified is where i am pointing

Is it sucking air? If so it'* a vacuum line. Go to auto parts and have them find a suitable replacement.