Hey guys, need some help identifying these cams. On the exhaust cam i can only find 3H21 stamped on them and the number 3, on the intake i can only find the number 3 and some markings stamped on it. I googled and searched but couldn't find anything so i thought i would ask for help, thanks.

 

They might have something laser etched into the ends where the cam gears or cas goes. I know brian crower cams do it would have a bc then the part#. Other companies cams might have this as well. If they don't I wouldn know how to identify them.