The Parts Master are Affinai/WIX made filters.I have cut open a PM filter and it had metal endcaps and the new ADBV/Bypass valve combo.
It seemed to be built well and had a good number of pleats.The element was stiff but that seems to be normal for WIX made filters.
If the ST you need is the e-core design with a plastic inner cage and felt like endcaps,is that what you prefer? or do you want a filter with a metal inner support tube and metal endcaps?
Some dont like the e-core and have problems with them because of flat places in the element.These flat places may possibly lead to holes because of the lack of center tube support from the plastic cage.The flat area can push up against the cage and since there is little support,a hole may develop.
There have also been reports of the endcaps being loose and not sealing well.
I cut open an ST recently and one of the endcaps could have had a better seal.