I was going through a garage SLAP A$$ FULL of honda stuff a guy gave me. He had an engine that has a b18c5 stamp. But it has this intake on it. It looks like a k series intake. I know you cant put a k head on a b block. I havent seen anyone put a k intake on a b head (idk if thats even possible). The guy that gave me all these things supposedly had a set of honda engine stamps so I dont know if it even is a b18c5. Any help is appreciated.
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Looks like GSR to me.

 

I agree, GSR curls downward, ITR goes straightish. Prelude has plenum on top and curls under.

 

Had the same intake on my 1995 GSR. Hope this helps.

 

B18c5 is usdm type r. Maybe its b18c1 as thats the gsr manifold.