sypher said:Don't know if this helps tou any but from the front of my hks 87mm items (paper booklet mostly in Jap' )
SR 20 DET
PS13 1991.01 ~ 1993.09
S14 1993.09 ~ 1998.12
S15 1999.01 ~ 2002.08
RPS13 1991.01 ~ 1998.12
RNN14 1990.08 ~ 1994.12
from this i can only PRESSUME that the pistons i have are compatable with the above engines so SHOULD have same dimentions....