I was looking at oldish car magazines at my uncle's house with my cousin and we saw this 20B PP turbo engine and started having a squabble over some parts in the engine.

Can someone please clarify what they are?

Here you go.

 

the blue thing is a Tial blow-off valve or maybe a pop off (there are two, not sure why)



Peterson makes dry sump stuff, so that might be the crank case vent and the oil tank, although not really sure about that

 

Thanks. If someone could explain why there are two blow off valves as well as confirm what the other two parts are that would be very helpful.

 

seeing the side port on the one that is on top it is most likely a wastegate and not a blow off valve. the placement is quite uncommon but the one manifold i know with a similar dual wastegate placement, places the front one pretty close to there, is the FULL-RACE external wastegate manifold for the fd

 

the Other aluminum container with a filter on top is a catch tank,

your arrow pointing to the red/blue AN fitting is where the oil filler neck goes.

 

Thank you. I thought it might've been a wastegate but the position threw me off.