The previous owner of my car specifically said that there was a new high performance cam in the engine...I just removed my valve cover and saw this:
on the other side it says
"Japan" and "B"
"B" is inbetween the lobes of cyl #5
"Japan" and "E30" are on opposite sides between cylinders 4 and 5
this is the only thing I could find about a cam with this stamp is:
http://forums.hybridz.org/showthread.php?t=108497&highlight=e30+cam
but that does not help much since that is on an L20 motor.
the head is an E88 with an E46 intake and roundtops.
Is this the stock cam, reground(possible), or off another model Z?
the cam does not feel that bad. Very little wear.