Now how exactly does the sleeving go down.........i kno that they are thicker and lets say you buy it for a b20 specifically 84mm block......now does that interfere with the size pistons application. Do you still use 84mm pistons or do you have to bore and then keep same size pistons for the fitment or what. How exactly does sleeving work.......cuz from what ive seen which was a close decked sleeve block.....it changed the whole complexion of the internals.

 

84mm sleeves will use 84mm pistons.

 

you bore the sleeves to the size of the pistons you'll be using