Who knows what this is?
 

It fell out when I took off the lower front engine cover...

looks similar to the clips on the air box.

This piece is about 3/8 wide and about 1 inch long...

like i said similar to this
BMW E39 M5 S62 5.0L Engine Intake - 13711707044 - Air Box Lid Clips - 34mm - ES#34839
google air box clips.

Thanks, but it is not like that. It does not have a cut-out on one end and an "s" hook on the other.

Is it part #3?
http://www.hondaautomotiveparts.com/...ELT+%28SOHC%29
I think it has something to do with keeping the sensor wires away from the moving parts, but I've never had exactly that model.

Part #16 may be of interest to you in another one of your posts about your timing belt job.

Yes, that is it! Thank you! I left it off putting everything back together...