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As you can see, That's the one to use. The windage tray is a good idea, but not a "have to" item. The function is to "wipe" away slinging oil from the crank, allowing it to drain the through tray. Not slinging all over the pan, rails, etc. and back on the crank...helps increase or should I say get back some HP.........5-7HP at 6K + rpm.