Im currently rebuilting my b18b1 and on the manual shop, i saw the Oil Breather.
I don't have in on my bloc. That's not a problem, i'll find this piece without any problem.

The question I was asking me, is What the hell this piece do ?

Thanks

 

thats the catch box for your crankcase breathing system. this thread will tell you all about it.

https://honda-tech.com/zerothread?id=1199935

 

So if I understand,

i could install an oil catch can insteed of this breather chamber ?

 

correct