[dragoontwo]

Originally Posted by Subaru Alliance

i was simply referring the size of the combustion chamber. I haven't seen the heads side by side to note the actual differences, my comment was simply the combustion chamber was the same size mathematically, but i see in my original post i said the same. My bad, thanks for the correction.

Don't forget that the piston shapes can be different, too. Bore and stroke are only 1 part of the equation.