Single Turbo Conversion Questions. Water And Oilfeed

[SSM]

Hello

I have started to strip down my RB26 R32 engine, and I have some questions that I hope some could help me with.

There is a LOT of water, air and oil lines on this engine. And I'm going single turbo.

So, what can I remove and what is done to all the lines when going single turbo?

I'm also wondering what the thing that is under the intake is. I have not pulled this engine myself, and this is my first time working on Nissan engines.