but like i said is there any other way to tell ie pistons etc?

 

if your badge says b18** then you have a b18, a b16** then a b16. Just look on the block.

As far as i know the b18 and b16's both have 81mm bore.

 

any one like 2 add to the b16 being same bore as ab18, ?

 

if it was a b16 it wouldnt say b18c. it would say b16a a1 a2 or a3
b16a integra xs-i jdm
b16a1 88-91 crx si-R jdm
b16a2 00-01 civic si usdm or 99-00. whatever the ek is usdm
b16a3 92-97 del sol si-R II usdm
b18c gs-R p72 and type R pr3 heads
b18c1 gsR usdm
b18c5 typer think both usdm&jdm

 

I thought that jdm motors didnt have a number after the letter on the block stamp?