why doesnt this block have an oil cooler?

i noticed that my 1st gen b16a(90) has an engine oil cooler behind the oil filter but my 2nd gen b16a(91) doesnt.???. wierd. why isnt there one. it should be there,no?thanks.

the question is why is there one there?

Earlier generations of b16’s and b18c’s came with them. Later on Honda stopped using them. It’s nothing to worry about.