pro-m calibration codes

Hey guys, I bought a used Pro-M MAF a while back and I've switched back to my stock one since I'm selling my car now. Now the one thing I wasn't able to find out when I bought it, is if it was calibrated for CAI or cone filter. I put it on at the same time as my put in my fenderwell BBK cai, and I've noticed since switching back to stock, that it seems to idle a bit better so I'm thinking it may be calibrated for a cone. Anyways, here's the codes on the top of the MAF :

E9ZF-12B579-AA
AFH55-03
8K03

If anyone has any idea what these mean, could you translate it for me? Thanks in advance for any help.

thanks, I tried looking for their site before and it was down. I'll give them an e-mail.