my 6.0 liter has a 4" bore so 101.6mm, not a huge increase over the subaru. but twice as many slugs. and longer stroke

ls2 6.0 has 101.6mm bore 3.622 stroke
b16 honda is 81mm and 3.047 stroke
d16 honda is 75mm and 3.543" stroke
subaru ej22 is 97mm and 3.110 stroke or 99.5mm for the 2.5 sti (same stroke)

interesting to see honda have two 1.6 liters with very different strokes and piston sizes