Purolator & Wix will not warranty standpipe oil filters for /6 but Baldwin will.

Mann, Wix, and Purolator are all saying they do not have a filter with a standpipe that is recommended for the slant.

This is only a concern if, say, you change your oil pump and do not have a replacement standpipe on the new pump. I have an NOS oil pump which did not include the standpipe - so I'm only using oil filters that have that feature.

The standard filters that appear in their catalog are fine and are not being contested here. Before changing my oil pump, I used the standard Baldwin, Purolator, and Wix filters all the time - equal quality for my concern.

Hope that adds clarity...