As the title ask, do I need the adapter to run long tube headers on my Challenger with a small block? I had headers on my '70 Challenger, but it was so long ago that I can't remember to tell the truth.
As I said, IF you want to use a longer filter and you can angle the filter to your liking. But you don't Have to. Their website has that info and says to use a "short filter or an angle adapter."
5. OIL FILTERS:
SHORT SCREW-ON STYLE OR A 90º ADAPTER CAN BE USED