Purolator makes the Motorcraft filters...they are just a tad of a step down internally from the Pure One filters. They have a lower flow than others, but this is because they filter much better. A lot of "high flow" filters don't filter as well. It's a trade off between filtering and flow.
Regardless, it's less of an issue with the 5.0's since we use such a large filter.
Regardless, it's less of an issue with the 5.0's since we use such a large filter.