In Walmart the other day and noticed that the Bosch distance plus filters had purolator date codes and louvers. All the other posts I've read are from 5 years ago and they said they were made by champ.
I believe they are made by purolator i would buy a better filter.. The Fram ultra is a great filter so far.. Hopefully they dont ruin it by going cheap and using louvers.
Google led me to this thread.. Just picked up a couple D3323's at walmart for $5 each. One has a louvered center tube, the other has a traditional center tube with round holes.