What valves are these?

A customer brought these into me.....
can't figure out if they are AIM IND or what......any ideas?

a href="http://xs.to/xs.php?h=xs208&d=06455&f=valves.jpg" target="_blank">

my buddy has those on his s10..they are from aim

they are from aim. i think they are made in texas.

cool thanks for the info.

does anyone have a link to them....or specs so I can cross them with something else.