Official parts names please.

Hi,

Have a 2003 1.6 petrol Octavia and over the last two weeks it is stuttering when I start it and go to take off, then a few moments later it's fine.

Had a look on saturday and saw the two pipes A & B in the picture were cracked -obviously effecting air flow and the engine when started.

As you can see I patched them up until I get replacements this week.

What are these pipe A & B called?

Can I get them online - do I need a part number ?

Does A & C come as one or separate?

Thx

K.