I understand where your coming from. I have been under the impression an annular was better for atomization. Sounds like a good thing to me, but BLP has done many flow tests of the 4150 with annular boosters and didn't like the results. Annulars is what i wanted for my 572 Hemi build in a 1.450 venturi twin carb deal and i was told downleg would be better. Curious to any improvements using annular boosters. Please let us know.