Originally Posted by lkailburn
91 would be 4th gen
phiz- from what i learned here, i think only the si prop valve is 4040. others are 8020
hehe, which Si ???
the 4040 stamp is a 60/40 front bias. Drum setups are a 80/20 front bias.
I think that's where your number comes from.
6th gen civics, the prop valves aren't stamped with 4040, even if it is an Si.
From what I understand.
-PHiZ