I just got a set of B16A2 PR3 .20 oversized Pistons, and my engine block is currently at 81mm, by getting the block oversized .20 it would increase the size to 81.50mm. would my block still be a 1.6? or could i but the block to 1.8. would i need a gsr crank shaft and rods. help

 

assuming you have a 1.6 right now.... yes your block would still be a 1.6(just over)

 

ok, what would i need if i wanted to get the engine to 1.8

 

not worth it, just buy a 1.8 block.

you can still use your new pistons