I have a 84 GSL with a 12A that I am having problem determining what I need to call the cracked hose at the bottom on the first picture. I know that the second hose is the idle compensator hose. I also need to see if some can tell me what the white split connector is also called.

 

you can get those t-connectors in any auto store... or online (see mcmaster.com and search ****** tube fittings ), sililarly with replacement hoses. UGH, WTF... barb ed tube fittings is the search

good luck.

 

do you know any manufacturer which produces good replacements for this hose?

 

Just head to your local parts store, they all carry vacuum tubing, and it'll probably outlast the original stuff which takes 20 some years to go bad.