I appreciate your opinion but the V&H set up routes the breathers direct into the venturi, the Ness version like the SE has ports pointing out toward the air cleaner, and are on the side of the venturi. The V&H routes the breather direct into the venturi. I had a similar set up on and 06 Dyna and it worked. I have had several Harleys, and all of them at some time would push oil through the air cleaner. The same was true with the Dyna until installed the SE filter and replaced the K&N set up I had on the bike. I would like to know how to eliminate the problem, but in three bikes and over 100,000 miles I can't find the answer. I don't get excessive blow by, just enough to be irritating when I am on a long trip and make a hard run at high temperature, and when I stop, I will find oil spots on my rear pipe usually after 3000 miles or so since I cleaned it. I am just trying to figure out if the V&H will flow as good as the Ness.